11658631 has 6 divisors (see below), whose sum is σ = 12188120. Its totient is φ = 11151228.

The previous prime is 11658629. The next prime is 11658671. The reversal of 11658631 is 13685611.

It is not a de Polignac number, because 11658631 - 2¹ = 11658629 is a prime.

It is a super-2 number, since 2×11658631² = 271847353588322, 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 = 11658593 and 11658602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11658601) 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 5 ways as a sum of consecutive naturals, for example, 10491 + ... + 11548.

Almost surely, 2^11658631 is an apocalyptic number.

11658631 is a deficient number, since it is larger than the sum of its proper divisors (529489).

11658631 is an equidigital number, since it uses as much as digits as its factorization.

11658631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22085 (or 22062 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 11658631 is about 3414.4737515465. The cubic root of 11658631 is about 226.7509867470.

The spelling of 11658631 in words is "eleven million, six hundred fifty-eight thousand, six hundred thirty-one".