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47474747 = 4773101137
BaseRepresentation
bin1011010100011…
…0100000111011
310022022222002222
42311012200323
544123142442
64413314255
71114346225
oct265064073
9108288088
1047474747
1124886531
1213a9598b
139ab2b88
14643b415
15427b8d2
hex2d4683b

47474747 has 16 divisors (see below), whose sum is σ = 49997952. Its totient is φ = 45043200.

The previous prime is 47474743. The next prime is 47474773. The reversal of 47474747 is 74747474.

47474747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 47474747 - 22 = 47474743 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

47474747 is an undulating number in base 10.

47474747 is a modest number, since divided by 474747 gives 47 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 47474698 and 47474707.

It is not an unprimeable number, because it can be changed into a prime (47474743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346463 + ... + 346599.

It is an arithmetic number, because the mean of its divisors is an integer number (3124872).

Almost surely, 247474747 is an apocalyptic number.

47474747 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

47474747 is a deficient number, since it is larger than the sum of its proper divisors (2523205).

47474747 is a wasteful number, since it uses less digits than its factorization.

47474747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358.

The product of its digits is 614656, while the sum is 44.

The square root of 47474747 is about 6890.1920873079. The cubic root of 47474747 is about 362.0936313462.

Adding to 47474747 its reverse (74747474), we get a palindrome (122222221).

The spelling of 47474747 in words is "forty-seven million, four hundred seventy-four thousand, seven hundred forty-seven".

Divisors: 1 47 73 101 137 3431 4747 6439 7373 10001 13837 346531 470047 650339 1010101 47474747