475447491 has 6 divisors (see below), whose sum is σ = 686757500. Its totient is φ = 316964988.

The previous prime is 475447459. The next prime is 475447493. The reversal of 475447491 is 194744574.

475447491 is a `hidden beast` number, since 47 + 54 + 474 + 91 = 666.

It is not a de Polignac number, because 475447491 - 2⁵ = 475447459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475447493) 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, 26413741 + ... + 26413758.

Almost surely, 2^475447491 is an apocalyptic number.

475447491 is a deficient number, since it is larger than the sum of its proper divisors (211310009).

475447491 is a wasteful number, since it uses less digits than its factorization.

475447491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52827505 (or 52827502 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 475447491 is about 21804.7584485589. The cubic root of 475447491 is about 780.4903179480.

The spelling of 475447491 in words is "four hundred seventy-five million, four hundred forty-seven thousand, four hundred ninety-one".