623655131 has 4 divisors (see below), whose sum is σ = 680351064. Its totient is φ = 566959200.

The previous prime is 623655127. The next prime is 623655161. The reversal of 623655131 is 131556326.

623655131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 623655131 - 2² = 623655127 is a prime.

It is a super-2 number, since 2×623655131² = 777891444845254322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623655161) 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, 28347950 + ... + 28347971.

It is an arithmetic number, because the mean of its divisors is an integer number (170087766).

Almost surely, 2^623655131 is an apocalyptic number.

623655131 is a deficient number, since it is larger than the sum of its proper divisors (56695933).

623655131 is a wasteful number, since it uses less digits than its factorization.

623655131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56695932.

The product of its digits is 16200, while the sum is 32.

The square root of 623655131 is about 24973.0881350305. The cubic root of 623655131 is about 854.3742813111.

The spelling of 623655131 in words is "six hundred twenty-three million, six hundred fifty-five thousand, one hundred thirty-one".