625204639 has 4 divisors (see below), whose sum is σ = 625935024. Its totient is φ = 624474256.

The previous prime is 625204637. The next prime is 625204661. The reversal of 625204639 is 936402526.

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

It is a cyclic number.

It is not a de Polignac number, because 625204639 - 2¹ = 625204637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625204598 and 625204607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625204637) 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, 363907 + ... + 365620.

It is an arithmetic number, because the mean of its divisors is an integer number (156483756).

Almost surely, 2^625204639 is an apocalyptic number.

625204639 is a deficient number, since it is larger than the sum of its proper divisors (730385).

625204639 is an equidigital number, since it uses as much as digits as its factorization.

625204639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730384.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 625204639 is about 25004.0924450379. The cubic root of 625204639 is about 855.0812772272.

The spelling of 625204639 in words is "six hundred twenty-five million, two hundred four thousand, six hundred thirty-nine".