475855691 has 2 divisors, whose sum is σ = 475855692. Its totient is φ = 475855690.

The previous prime is 475855661. The next prime is 475855739. The reversal of 475855691 is 196558574.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475855691 is a prime.

It is not a weakly prime, because it can be changed into another prime (475855621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237927845 + 237927846.

It is an arithmetic number, because the mean of its divisors is an integer number (237927846).

Almost surely, 2^475855691 is an apocalyptic number.

475855691 is a deficient number, since it is larger than the sum of its proper divisors (1).

475855691 is an equidigital number, since it uses as much as digits as its factorization.

475855691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 50.

The square root of 475855691 is about 21814.1167824874. The cubic root of 475855691 is about 780.7136198684.

The spelling of 475855691 in words is "four hundred seventy-five million, eight hundred fifty-five thousand, six hundred ninety-one".