475907891 has 2 divisors, whose sum is σ = 475907892. Its totient is φ = 475907890.

The previous prime is 475907879. The next prime is 475907897. The reversal of 475907891 is 198709574.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475907891 is a prime.

It is not a weakly prime, because it can be changed into another prime (475907897) 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 as a sum of consecutive naturals, namely, 237953945 + 237953946.

It is an arithmetic number, because the mean of its divisors is an integer number (237953946).

Almost surely, 2^475907891 is an apocalyptic number.

475907891 is a deficient number, since it is larger than the sum of its proper divisors (1).

475907891 is an equidigital number, since it uses as much as digits as its factorization.

475907891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 475907891 is about 21815.3132225966. The cubic root of 475907891 is about 780.7421661705.

The spelling of 475907891 in words is "four hundred seventy-five million, nine hundred seven thousand, eight hundred ninety-one".