478926913 has 2 divisors, whose sum is σ = 478926914. Its totient is φ = 478926912.

The previous prime is 478926887. The next prime is 478926919. The reversal of 478926913 is 319629874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241243024 + 237683889 = 15532^2 + 15417^2 .

It is a cyclic number.

It is not a de Polignac number, because 478926913 - 2⁵ = 478926881 is a prime.

It is not a weakly prime, because it can be changed into another prime (478926919) 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, 239463456 + 239463457.

It is an arithmetic number, because the mean of its divisors is an integer number (239463457).

Almost surely, 2^478926913 is an apocalyptic number.

It is an amenable number.

478926913 is a deficient number, since it is larger than the sum of its proper divisors (1).

478926913 is an equidigital number, since it uses as much as digits as its factorization.

478926913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 478926913 is about 21884.3988494087. The cubic root of 478926913 is about 782.3896215610.

The spelling of 478926913 in words is "four hundred seventy-eight million, nine hundred twenty-six thousand, nine hundred thirteen".