475988521 has 2 divisors, whose sum is σ = 475988522. Its totient is φ = 475988520.

The previous prime is 475988489. The next prime is 475988531. The reversal of 475988521 is 125889574.

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., 376786921 + 99201600 = 19411^2 + 9960^2 .

It is a cyclic number.

It is not a de Polignac number, because 475988521 - 2⁵ = 475988489 is a prime.

It is not a weakly prime, because it can be changed into another prime (475988531) 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 as a sum of consecutive naturals, namely, 237994260 + 237994261.

It is an arithmetic number, because the mean of its divisors is an integer number (237994261).

Almost surely, 2^475988521 is an apocalyptic number.

It is an amenable number.

475988521 is a deficient number, since it is larger than the sum of its proper divisors (1).

475988521 is an equidigital number, since it uses as much as digits as its factorization.

475988521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 49.

The square root of 475988521 is about 21817.1611581342. The cubic root of 475988521 is about 780.7862557147.

The spelling of 475988521 in words is "four hundred seventy-five million, nine hundred eighty-eight thousand, five hundred twenty-one".