625622639 has 8 divisors (see below), whose sum is σ = 628996368. Its totient is φ = 622258560.

The previous prime is 625622611. The next prime is 625622659. The reversal of 625622639 is 936226526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625622639 - 2⁸ = 625622383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625622596 and 625622605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625622659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153344 + ... + 157370.

It is an arithmetic number, because the mean of its divisors is an integer number (78624546).

Almost surely, 2^625622639 is an apocalyptic number.

625622639 is a deficient number, since it is larger than the sum of its proper divisors (3373729).

625622639 is a wasteful number, since it uses less digits than its factorization.

625622639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825.

The product of its digits is 233280, while the sum is 41.

The square root of 625622639 is about 25012.4496801093. The cubic root of 625622639 is about 855.2717984985.

The spelling of 625622639 in words is "six hundred twenty-five million, six hundred twenty-two thousand, six hundred thirty-nine".