923642655 has 64 divisors (see below), whose sum is σ = 1643752320. Its totient is φ = 439934976.

The previous prime is 923642653. The next prime is 923642659. The reversal of 923642655 is 556246329.

It is a happy number.

It is not a de Polignac number, because 923642655 - 2¹ = 923642653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923642651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2258091 + ... + 2258499.

It is an arithmetic number, because the mean of its divisors is an integer number (25683630).

It is the magic constant of a 1227 × 1227 magic square.

Almost surely, 2^923642655 is an apocalyptic number.

923642655 is a deficient number, since it is larger than the sum of its proper divisors (720109665).

923642655 is a wasteful number, since it uses less digits than its factorization.

923642655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its digits is 388800, while the sum is 42.

The square root of 923642655 is about 30391.4898450208. The cubic root of 923642655 is about 973.8707610033.

The spelling of 923642655 in words is "nine hundred twenty-three million, six hundred forty-two thousand, six hundred fifty-five".