11990631 has 8 divisors (see below), whose sum is σ = 16003584. Its totient is φ = 7985720.

The previous prime is 11990623. The next prime is 11990633. The reversal of 11990631 is 13609911.

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

It is a cyclic number.

It is not a de Polignac number, because 11990631 - 2³ = 11990623 is a prime.

It is a super-2 number, since 2×11990631² = 287550463556322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11990633) 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, 4330 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (2000448).

Almost surely, 2^11990631 is an apocalyptic number.

11990631 is a deficient number, since it is larger than the sum of its proper divisors (4012953).

11990631 is a wasteful number, since it uses less digits than its factorization.

11990631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 11990631 is about 3462.7490524149. The cubic root of 11990631 is about 228.8832506213.

It can be divided in two parts, 11990 and 631, that added together give a palindrome (12621).

The spelling of 11990631 in words is "eleven million, nine hundred ninety thousand, six hundred thirty-one".