625562813 has 2 divisors, whose sum is σ = 625562814. Its totient is φ = 625562812.

The previous prime is 625562779. The next prime is 625562831. The reversal of 625562813 is 318265526.

625562813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (625562831) 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., 525922489 + 99640324 = 22933^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 625562813 - 2¹⁰ = 625561789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625562893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312781406 + 312781407.

It is an arithmetic number, because the mean of its divisors is an integer number (312781407).

Almost surely, 2^625562813 is an apocalyptic number.

It is an amenable number.

625562813 is a deficient number, since it is larger than the sum of its proper divisors (1).

625562813 is an equidigital number, since it uses as much as digits as its factorization.

625562813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 625562813 is about 25011.2537270725. The cubic root of 625562813 is about 855.2445354603.

The spelling of 625562813 in words is "six hundred twenty-five million, five hundred sixty-two thousand, eight hundred thirteen".