475657991 has 8 divisors (see below), whose sum is σ = 483300480. Its totient is φ = 468031608.

The previous prime is 475657981. The next prime is 475657993. The reversal of 475657991 is 199756574.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 475657991 - 2⁶ = 475657927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475657993) 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 7 ways as a sum of consecutive naturals, for example, 64790 + ... + 71756.

It is an arithmetic number, because the mean of its divisors is an integer number (60412560).

Almost surely, 2^475657991 is an apocalyptic number.

475657991 is a deficient number, since it is larger than the sum of its proper divisors (7642489).

475657991 is a wasteful number, since it uses less digits than its factorization.

475657991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053.

The product of its digits is 2381400, while the sum is 53.

The square root of 475657991 is about 21809.5848424494. The cubic root of 475657991 is about 780.6054859211.

The spelling of 475657991 in words is "four hundred seventy-five million, six hundred fifty-seven thousand, nine hundred ninety-one".