478549013 has 2 divisors, whose sum is σ = 478549014. Its totient is φ = 478549012.

The previous prime is 478549003. The next prime is 478549037. The reversal of 478549013 is 310945874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274001809 + 204547204 = 16553^2 + 14302^2 .

It is a cyclic number.

It is not a de Polignac number, because 478549013 - 2⁶ = 478548949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478549003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239274506 + 239274507.

It is an arithmetic number, because the mean of its divisors is an integer number (239274507).

Almost surely, 2^478549013 is an apocalyptic number.

It is an amenable number.

478549013 is a deficient number, since it is larger than the sum of its proper divisors (1).

478549013 is an equidigital number, since it uses as much as digits as its factorization.

478549013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 478549013 is about 21875.7631409741. The cubic root of 478549013 is about 782.1837844214.

The spelling of 478549013 in words is "four hundred seventy-eight million, five hundred forty-nine thousand, thirteen".