623331655 has 32 divisors (see below), whose sum is σ = 796910400. Its totient is φ = 467238912.

The previous prime is 623331647. The next prime is 623331659. The reversal of 623331655 is 556133326.

It is a cyclic number.

It is not a de Polignac number, because 623331655 - 2³ = 623331647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623331655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623331659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1602201 + ... + 1602589.

It is an arithmetic number, because the mean of its divisors is an integer number (24903450).

Almost surely, 2^623331655 is an apocalyptic number.

623331655 is a deficient number, since it is larger than the sum of its proper divisors (173578745).

623331655 is a wasteful number, since it uses less digits than its factorization.

623331655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 48600, while the sum is 34.

The square root of 623331655 is about 24966.6108032308. The cubic root of 623331655 is about 854.2265408066.

The spelling of 623331655 in words is "six hundred twenty-three million, three hundred thirty-one thousand, six hundred fifty-five".