623699257 has 16 divisors (see below), whose sum is σ = 668642688. Its totient is φ = 580328320.

The previous prime is 623699243. The next prime is 623699327. The reversal of 623699257 is 752996326.

623699257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623699257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623699257.

It is not an unprimeable number, because it can be changed into a prime (623699227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417003 + ... + 418495.

It is an arithmetic number, because the mean of its divisors is an integer number (41790168).

Almost surely, 2^623699257 is an apocalyptic number.

It is an amenable number.

623699257 is a deficient number, since it is larger than the sum of its proper divisors (44943431).

623699257 is a wasteful number, since it uses less digits than its factorization.

623699257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000.

The product of its digits is 1224720, while the sum is 49.

The square root of 623699257 is about 24973.9715904379. The cubic root of 623699257 is about 854.3944309250.

The spelling of 623699257 in words is "six hundred twenty-three million, six hundred ninety-nine thousand, two hundred fifty-seven".