625321513 has 2 divisors, whose sum is σ = 625321514. Its totient is φ = 625321512.

The previous prime is 625321451. The next prime is 625321531. The reversal of 625321513 is 315123526.

Together with next prime (625321531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362978704 + 262342809 = 19052^2 + 16197^2 .

It is a cyclic number.

It is not a de Polignac number, because 625321513 - 2²⁵ = 591767081 is a prime.

It is not a weakly prime, because it can be changed into another prime (625321583) 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, 312660756 + 312660757.

It is an arithmetic number, because the mean of its divisors is an integer number (312660757).

Almost surely, 2^625321513 is an apocalyptic number.

It is an amenable number.

625321513 is a deficient number, since it is larger than the sum of its proper divisors (1).

625321513 is an equidigital number, since it uses as much as digits as its factorization.

625321513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 625321513 is about 25006.4294332478. The cubic root of 625321513 is about 855.1345560719.

The spelling of 625321513 in words is "six hundred twenty-five million, three hundred twenty-one thousand, five hundred thirteen".