11988631 has 2 divisors, whose sum is σ = 11988632. Its totient is φ = 11988630.

The previous prime is 11988617. The next prime is 11988637. The reversal of 11988631 is 13688911.

11988631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11988631 is a prime.

It is a super-2 number, since 2×11988631² = 287454546508322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11988637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994315 + 5994316.

It is an arithmetic number, because the mean of its divisors is an integer number (5994316).

Almost surely, 2^11988631 is an apocalyptic number.

11988631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11988631 is an equidigital number, since it uses as much as digits as its factorization.

11988631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 37.

The square root of 11988631 is about 3462.4602524794. The cubic root of 11988631 is about 228.8705242420.

The spelling of 11988631 in words is "eleven million, nine hundred eighty-eight thousand, six hundred thirty-one".