479138521 has 2 divisors, whose sum is σ = 479138522. Its totient is φ = 479138520.

The previous prime is 479138503. The next prime is 479138623. The reversal of 479138521 is 125831974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463928521 + 15210000 = 21539^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 479138521 - 2²³ = 470749913 is a prime.

It is not a weakly prime, because it can be changed into another prime (479138501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239569260 + 239569261.

It is an arithmetic number, because the mean of its divisors is an integer number (239569261).

Almost surely, 2^479138521 is an apocalyptic number.

It is an amenable number.

479138521 is a deficient number, since it is larger than the sum of its proper divisors (1).

479138521 is an equidigital number, since it uses as much as digits as its factorization.

479138521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 479138521 is about 21889.2329925011. The cubic root of 479138521 is about 782.5048343565.

The spelling of 479138521 in words is "four hundred seventy-nine million, one hundred thirty-eight thousand, five hundred twenty-one".