475694257 has 6 divisors (see below), whose sum is σ = 497276402. Its totient is φ = 455011392.

The previous prime is 475694227. The next prime is 475694281. The reversal of 475694257 is 752496574.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 475414416 + 279841 = 21804^2 + 529^2 .

It is a de Polignac number, because none of the positive numbers 2^k-475694257 is a prime.

It is a super-2 number, since 2×475694257² = 452570052285564098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 475694257.

It is not an unprimeable number, because it can be changed into a prime (475694227) 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 5 ways as a sum of consecutive naturals, for example, 449088 + ... + 450145.

Almost surely, 2^475694257 is an apocalyptic number.

It is an amenable number.

475694257 is a deficient number, since it is larger than the sum of its proper divisors (21582145).

475694257 is an equidigital number, since it uses as much as digits as its factorization.

475694257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899279 (or 899256 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The square root of 475694257 is about 21810.4162500398. The cubic root of 475694257 is about 780.6253242080.

The spelling of 475694257 in words is "four hundred seventy-five million, six hundred ninety-four thousand, two hundred fifty-seven".