11959631 has 4 divisors (see below), whose sum is σ = 12021792. Its totient is φ = 11897472.

The previous prime is 11959627. The next prime is 11959669. The reversal of 11959631 is 13695911.

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

It is a cyclic number.

It is not a de Polignac number, because 11959631 - 2² = 11959627 is a prime.

It is a super-2 number, since 2×11959631² = 286065547312322, 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 = 11959591 and 11959600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11959601) 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, 30791 + ... + 31176.

It is an arithmetic number, because the mean of its divisors is an integer number (3005448).

Almost surely, 2^11959631 is an apocalyptic number.

11959631 is a deficient number, since it is larger than the sum of its proper divisors (62161).

11959631 is an equidigital number, since it uses as much as digits as its factorization.

11959631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62160.

The product of its digits is 7290, while the sum is 35.

The square root of 11959631 is about 3458.2699431941. The cubic root of 11959631 is about 228.6858324801.

The spelling of 11959631 in words is "eleven million, nine hundred fifty-nine thousand, six hundred thirty-one".