625387939 has 4 divisors (see below), whose sum is σ = 682241400. Its totient is φ = 568534480.

The previous prime is 625387933. The next prime is 625387943. The reversal of 625387939 is 939783526.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625387939 is a prime.

It is a super-2 number, since 2×625387939² = 782220148493335442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625387933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28426714 + ... + 28426735.

It is an arithmetic number, because the mean of its divisors is an integer number (170560350).

Almost surely, 2^625387939 is an apocalyptic number.

625387939 is a deficient number, since it is larger than the sum of its proper divisors (56853461).

625387939 is a wasteful number, since it uses less digits than its factorization.

625387939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56853460.

The product of its digits is 2449440, while the sum is 52.

The square root of 625387939 is about 25007.7575764002. The cubic root of 625387939 is about 855.1648344464.

The spelling of 625387939 in words is "six hundred twenty-five million, three hundred eighty-seven thousand, nine hundred thirty-nine".