479646721 has 16 divisors (see below), whose sum is σ = 522087120. Its totient is φ = 438958080.

The previous prime is 479646701. The next prime is 479646737. The reversal of 479646721 is 127646974.

It can be written as a sum of positive squares in 8 ways, for example, as 53802225 + 425844496 = 7335^2 + 20636^2 .

It is a cyclic number.

It is not a de Polignac number, because 479646721 - 2⁷ = 479646593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479646701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89695 + ... + 94891.

It is an arithmetic number, because the mean of its divisors is an integer number (32630445).

Almost surely, 2^479646721 is an apocalyptic number.

It is an amenable number.

479646721 is a deficient number, since it is larger than the sum of its proper divisors (42440399).

479646721 is a wasteful number, since it uses less digits than its factorization.

479646721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364.

The product of its digits is 508032, while the sum is 46.

The square root of 479646721 is about 21900.8383629486. The cubic root of 479646721 is about 782.7813921269.

The spelling of 479646721 in words is "four hundred seventy-nine million, six hundred forty-six thousand, seven hundred twenty-one".