623622921 has 16 divisors (see below), whose sum is σ = 877040640. Its totient is φ = 393066000.

The previous prime is 623622863. The next prime is 623622941. The reversal of 623622921 is 129226326.

623622921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623622921 - 2¹⁵ = 623590153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623622941) 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, 17796 + ... + 39546.

It is an arithmetic number, because the mean of its divisors is an integer number (54815040).

Almost surely, 2^623622921 is an apocalyptic number.

It is an amenable number.

623622921 is a deficient number, since it is larger than the sum of its proper divisors (253417719).

623622921 is a wasteful number, since it uses less digits than its factorization.

623622921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22276.

The product of its digits is 15552, while the sum is 33.

The square root of 623622921 is about 24972.4432324913. The cubic root of 623622921 is about 854.3595723969.

The spelling of 623622921 in words is "six hundred twenty-three million, six hundred twenty-two thousand, nine hundred twenty-one".