11664431 has 4 divisors (see below), whose sum is σ = 12350592. Its totient is φ = 10978272.

The previous prime is 11664421. The next prime is 11664437. The reversal of 11664431 is 13446611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11664431 is a prime.

It is a super-2 number, since 2×11664431² = 272117901107522, 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 11664431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11664437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343055 + ... + 343088.

It is an arithmetic number, because the mean of its divisors is an integer number (3087648).

Almost surely, 2^11664431 is an apocalyptic number.

11664431 is a deficient number, since it is larger than the sum of its proper divisors (686161).

11664431 is an equidigital number, since it uses as much as digits as its factorization.

11664431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686160.

The product of its digits is 1728, while the sum is 26.

The square root of 11664431 is about 3415.3229715504. The cubic root of 11664431 is about 226.7885822902.

The spelling of 11664431 in words is "eleven million, six hundred sixty-four thousand, four hundred thirty-one".