626648879 has 4 divisors (see below), whose sum is σ = 641933040. Its totient is φ = 611364720.

The previous prime is 626648857. The next prime is 626648927. The reversal of 626648879 is 978846626.

It is a happy number.

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 626648879 - 2¹² = 626644783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626648479) 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, 7642019 + ... + 7642100.

It is an arithmetic number, because the mean of its divisors is an integer number (160483260).

Almost surely, 2^626648879 is an apocalyptic number.

626648879 is a deficient number, since it is larger than the sum of its proper divisors (15284161).

626648879 is a wasteful number, since it uses less digits than its factorization.

626648879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15284160.

The product of its digits is 6967296, while the sum is 56.

The square root of 626648879 is about 25032.9558582282. The cubic root of 626648879 is about 855.7391913501.

The spelling of 626648879 in words is "six hundred twenty-six million, six hundred forty-eight thousand, eight hundred seventy-nine".