625034639 has 2 divisors, whose sum is σ = 625034640. Its totient is φ = 625034638.

The previous prime is 625034611. The next prime is 625034647. The reversal of 625034639 is 936430526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625034639 - 2²⁰ = 623986063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625234639) 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, 312517319 + 312517320.

It is an arithmetic number, because the mean of its divisors is an integer number (312517320).

Almost surely, 2^625034639 is an apocalyptic number.

625034639 is a deficient number, since it is larger than the sum of its proper divisors (1).

625034639 is an equidigital number, since it uses as much as digits as its factorization.

625034639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 625034639 is about 25000.6927704014. The cubic root of 625034639 is about 855.0037682084.

The spelling of 625034639 in words is "six hundred twenty-five million, thirty-four thousand, six hundred thirty-nine".