623646249 has 16 divisors (see below), whose sum is σ = 849499200. Its totient is φ = 406848960.

The previous prime is 623646197. The next prime is 623646269. The reversal of 623646249 is 942646326.

It is not a de Polignac number, because 623646249 - 2¹² = 623642153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623646249.

It is not an unprimeable number, because it can be changed into a prime (623646269) 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, 27402 + ... + 44700.

It is an arithmetic number, because the mean of its divisors is an integer number (53093700).

Almost surely, 2^623646249 is an apocalyptic number.

It is an amenable number.

623646249 is a deficient number, since it is larger than the sum of its proper divisors (225852951).

623646249 is a wasteful number, since it uses less digits than its factorization.

623646249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17560.

The product of its digits is 373248, while the sum is 42.

The square root of 623646249 is about 24972.9103029663. The cubic root of 623646249 is about 854.3702253363.

The spelling of 623646249 in words is "six hundred twenty-three million, six hundred forty-six thousand, two hundred forty-nine".