404479013 has 2 divisors, whose sum is σ = 404479014. Its totient is φ = 404479012.

The previous prime is 404479007. The next prime is 404479051. The reversal of 404479013 is 310974404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313219204 + 91259809 = 17698^2 + 9553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404479013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404479073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202239506 + 202239507.

It is an arithmetic number, because the mean of its divisors is an integer number (202239507).

Almost surely, 2^404479013 is an apocalyptic number.

It is an amenable number.

404479013 is a deficient number, since it is larger than the sum of its proper divisors (1).

404479013 is an equidigital number, since it uses as much as digits as its factorization.

404479013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 404479013 is about 20111.6636059775. The cubic root of 404479013 is about 739.5462356896.

The spelling of 404479013 in words is "four hundred four million, four hundred seventy-nine thousand, thirteen".