475888660921 has 2 divisors, whose sum is σ = 475888660922. Its totient is φ = 475888660920.

The previous prime is 475888660873. The next prime is 475888660943. The reversal of 475888660921 is 129066888574.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412503045696 + 63385615225 = 642264^2 + 251765^2 .

It is a cyclic number.

It is not a de Polignac number, because 475888660921 - 2²³ = 475880272313 is a prime.

It is not a weakly prime, because it can be changed into another prime (475888660991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237944330460 + 237944330461.

It is an arithmetic number, because the mean of its divisors is an integer number (237944330461).

Almost surely, 2^475888660921 is an apocalyptic number.

It is an amenable number.

475888660921 is a deficient number, since it is larger than the sum of its proper divisors (1).

475888660921 is an equidigital number, since it uses as much as digits as its factorization.

475888660921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 475888660921 in words is "four hundred seventy-five billion, eight hundred eighty-eight million, six hundred sixty thousand, nine hundred twenty-one".