625574731 has 2 divisors, whose sum is σ = 625574732. Its totient is φ = 625574730.

The previous prime is 625574713. The next prime is 625574737. The reversal of 625574731 is 137475526.

Together with previous prime (625574713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625574731 - 2¹⁷ = 625443659 is a prime.

It is a super-2 number, since 2×625574731² = 782687488131444722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625574737) 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, 312787365 + 312787366.

It is an arithmetic number, because the mean of its divisors is an integer number (312787366).

Almost surely, 2^625574731 is an apocalyptic number.

625574731 is a deficient number, since it is larger than the sum of its proper divisors (1).

625574731 is an equidigital number, since it uses as much as digits as its factorization.

625574731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The square root of 625574731 is about 25011.4919786885. The cubic root of 625574731 is about 855.2499666973.

The spelling of 625574731 in words is "six hundred twenty-five million, five hundred seventy-four thousand, seven hundred thirty-one".