625006399 has 4 divisors (see below), whose sum is σ = 625848336. Its totient is φ = 624164464.

The previous prime is 625006379. The next prime is 625006429. The reversal of 625006399 is 993600526.

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 625006399 - 2²⁵ = 591451967 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625006379) 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, 419854 + ... + 421339.

It is an arithmetic number, because the mean of its divisors is an integer number (156462084).

Almost surely, 2^625006399 is an apocalyptic number.

625006399 is a deficient number, since it is larger than the sum of its proper divisors (841937).

625006399 is an equidigital number, since it uses as much as digits as its factorization.

625006399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841936.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 625006399 is about 25000.1279796724. The cubic root of 625006399 is about 854.9908912313.

The spelling of 625006399 in words is "six hundred twenty-five million, six thousand, three hundred ninety-nine".