123131992 has 16 divisors (see below), whose sum is σ = 231069960. Its totient is φ = 61513344.

The previous prime is 123131971. The next prime is 123132011. The reversal of 123131992 is 299131321.

It is a super-2 number, since 2×123131992² = 30322974907776128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4443 + ... + 16309.

Almost surely, 2^123131992 is an apocalyptic number.

It is an amenable number.

123131992 is a deficient number, since it is larger than the sum of its proper divisors (107937968).

123131992 is a wasteful number, since it uses less digits than its factorization.

123131992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170 (or 13166 counting only the distinct ones).

The product of its digits is 2916, while the sum is 31.

The square root of 123131992 is about 11096.4855697649. The cubic root of 123131992 is about 497.4968116762.

The spelling of 123131992 in words is "one hundred twenty-three million, one hundred thirty-one thousand, nine hundred ninety-two".