11992431 has 12 divisors (see below), whose sum is σ = 17576216. Its totient is φ = 7267920.

The previous prime is 11992423. The next prime is 11992433. The reversal of 11992431 is 13429911.

It is not a de Polignac number, because 11992431 - 2³ = 11992423 is a prime.

It is a super-2 number, since 2×11992431² = 287636802579522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16156 + ... + 16881.

Almost surely, 2^11992431 is an apocalyptic number.

11992431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11992431 is a deficient number, since it is larger than the sum of its proper divisors (5583785).

11992431 is a wasteful number, since it uses less digits than its factorization.

11992431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33062 (or 33051 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 11992431 is about 3463.0089517643. The cubic root of 11992431 is about 228.8947031528.

The spelling of 11992431 in words is "eleven million, nine hundred ninety-two thousand, four hundred thirty-one".