921923631 has 6 divisors (see below), whose sum is σ = 1331667480. Its totient is φ = 614615748.

The previous prime is 921923609. The next prime is 921923633. The reversal of 921923631 is 136329129.

It is a happy number.

921923631 is a `hidden beast` number, since 9 + 2 + 19 + 2 + 3 + 631 = 666.

It is not a de Polignac number, because 921923631 - 2⁷ = 921923503 is a prime.

It is a super-2 number, since 2×921923631² = 1699886362792448322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921923633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51217971 + ... + 51217988.

It is an arithmetic number, because the mean of its divisors is an integer number (221944580).

Almost surely, 2^921923631 is an apocalyptic number.

921923631 is a deficient number, since it is larger than the sum of its proper divisors (409743849).

921923631 is a wasteful number, since it uses less digits than its factorization.

921923631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102435965 (or 102435962 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 921923631 is about 30363.1953358009. The cubic root of 921923631 is about 973.2662173676.

The spelling of 921923631 in words is "nine hundred twenty-one million, nine hundred twenty-three thousand, six hundred thirty-one".