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130470631 = 177674743
BaseRepresentation
bin1111100011011…
…01001011100111
3100002111121001121
413301231023213
5231400030011
620540234411
73142660564
oct761551347
9302447047
10130470631
1167713575
123783ba07
1321051a75
141348386b
15b6c2e71
hex7c6d2e7

130470631 has 4 divisors (see below), whose sum is σ = 138145392. Its totient is φ = 122795872.

The previous prime is 130470617. The next prime is 130470667. The reversal of 130470631 is 136074031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136074031 = 184773673.

It is a cyclic number.

It is not a de Polignac number, because 130470631 - 27 = 130470503 is a prime.

It is a super-2 number, since 2×1304706312 = 34045171107076322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130470596 and 130470605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130470031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3837355 + ... + 3837388.

It is an arithmetic number, because the mean of its divisors is an integer number (34536348).

Almost surely, 2130470631 is an apocalyptic number.

130470631 is a deficient number, since it is larger than the sum of its proper divisors (7674761).

130470631 is an equidigital number, since it uses as much as digits as its factorization.

130470631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674760.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 130470631 is about 11422.3741402565. The cubic root of 130470631 is about 507.1902787974.

The spelling of 130470631 in words is "one hundred thirty million, four hundred seventy thousand, six hundred thirty-one".

Divisors: 1 17 7674743 130470631