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675505447 = 4315709429
BaseRepresentation
bin101000010000110…
…110010100100111
31202002002020021021
4220100312110213
52340412133242
6151010232011
722511462431
oct5020662447
91662066237
10675505447
1131733a271
1216a285607
13a9c44286
14659dd651
153e484b67
hex28436527

675505447 has 4 divisors (see below), whose sum is σ = 691214920. Its totient is φ = 659795976.

The previous prime is 675505433. The next prime is 675505459. The reversal of 675505447 is 744505576.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 675505447 - 219 = 674981159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 15709429 = 675505447 / (6 + 7 + 5 + 5 + 0 + 5 + 4 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675505417) 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 3 ways as a sum of consecutive naturals, for example, 7854672 + ... + 7854757.

It is an arithmetic number, because the mean of its divisors is an integer number (172803730).

Almost surely, 2675505447 is an apocalyptic number.

675505447 is the 13893-rd centered heptagonal number.

675505447 is a deficient number, since it is larger than the sum of its proper divisors (15709473).

675505447 is a wasteful number, since it uses less digits than its factorization.

675505447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15709472.

The product of its (nonzero) digits is 588000, while the sum is 43.

The square root of 675505447 is about 25990.4876252832. The cubic root of 675505447 is about 877.4242203156.

The spelling of 675505447 in words is "six hundred seventy-five million, five hundred five thousand, four hundred forty-seven".

Divisors: 1 43 15709429 675505447