623117907 has 8 divisors (see below), whose sum is σ = 923137680. Its totient is φ = 415411920.

The previous prime is 623117903. The next prime is 623117921. The reversal of 623117907 is 709711326.

It is a happy number.

It is not a de Polignac number, because 623117907 - 2² = 623117903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623117903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11539194 + ... + 11539247.

It is an arithmetic number, because the mean of its divisors is an integer number (115392210).

Almost surely, 2^623117907 is an apocalyptic number.

623117907 is a deficient number, since it is larger than the sum of its proper divisors (300019773).

623117907 is a wasteful number, since it uses less digits than its factorization.

623117907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078450 (or 23078444 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 623117907 is about 24962.3297590589. The cubic root of 623117907 is about 854.1288880895.

The spelling of 623117907 in words is "six hundred twenty-three million, one hundred seventeen thousand, nine hundred seven".