11920931 has 4 divisors (see below), whose sum is σ = 13004664. Its totient is φ = 10837200.

The previous prime is 11920913. The next prime is 11920949. The reversal of 11920931 is 13902911.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11920913) and next prime (11920949).

It is a de Polignac number, because none of the positive numbers 2^k-11920931 is a prime.

It is a super-2 number, since 2×11920931² = 284217191813522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11920931.

It is not an unprimeable number, because it can be changed into a prime (11920901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541850 + ... + 541871.

It is an arithmetic number, because the mean of its divisors is an integer number (3251166).

Almost surely, 2^11920931 is an apocalyptic number.

11920931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11920931 is a deficient number, since it is larger than the sum of its proper divisors (1083733).

11920931 is a wasteful number, since it uses less digits than its factorization.

11920931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083732.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 11920931 is about 3452.6701261487. The cubic root of 11920931 is about 228.4388988601.

The spelling of 11920931 in words is "eleven million, nine hundred twenty thousand, nine hundred thirty-one".