11973831 has 8 divisors (see below), whose sum is σ = 16904304. Its totient is φ = 7512960.

The previous prime is 11973821. The next prime is 11973833. The reversal of 11973831 is 13837911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11973831 - 2⁵ = 11973799 is a prime.

It is a super-2 number, since 2×11973831² = 286745257633122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11973792 and 11973801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117340 + ... + 117441.

It is an arithmetic number, because the mean of its divisors is an integer number (2113038).

Almost surely, 2^11973831 is an apocalyptic number.

11973831 is the 2189-th centered pentagonal number.

11973831 is a deficient number, since it is larger than the sum of its proper divisors (4930473).

11973831 is a wasteful number, since it uses less digits than its factorization.

11973831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234801.

The product of its digits is 4536, while the sum is 33.

The square root of 11973831 is about 3460.3223838250. The cubic root of 11973831 is about 228.7763050164.

The spelling of 11973831 in words is "eleven million, nine hundred seventy-three thousand, eight hundred thirty-one".