11992931 has 4 divisors (see below), whose sum is σ = 12004032. Its totient is φ = 11981832.

The previous prime is 11992909. The next prime is 11992957. The reversal of 11992931 is 13929911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13929911 = 1453 ⋅9587.

It is a cyclic number.

It is not a de Polignac number, because 11992931 - 2²² = 7798627 is a prime.

It is a super-2 number, since 2×11992931² = 287660787941522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11992891 and 11992900.

It is not an unprimeable number, because it can be changed into a prime (11992901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3731 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (3001008).

Almost surely, 2^11992931 is an apocalyptic number.

11992931 is a deficient number, since it is larger than the sum of its proper divisors (11101).

11992931 is an equidigital number, since it uses as much as digits as its factorization.

11992931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100.

The product of its digits is 4374, while the sum is 35.

The square root of 11992931 is about 3463.0811425665. The cubic root of 11992931 is about 228.8978842082.

The spelling of 11992931 in words is "eleven million, nine hundred ninety-two thousand, nine hundred thirty-one".