11812631 has 2 divisors, whose sum is σ = 11812632. Its totient is φ = 11812630.

The previous prime is 11812627. The next prime is 11812667. The reversal of 11812631 is 13621811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11812631 - 2² = 11812627 is a prime.

It is a super-2 number, since 2×11812631² = 279076502284322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11812597 and 11812606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11812601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5906315 + 5906316.

It is an arithmetic number, because the mean of its divisors is an integer number (5906316).

Almost surely, 2^11812631 is an apocalyptic number.

11812631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11812631 is an equidigital number, since it uses as much as digits as its factorization.

11812631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 11812631 is about 3436.9508288598. The cubic root of 11812631 is about 227.7450147778.

The spelling of 11812631 in words is "eleven million, eight hundred twelve thousand, six hundred thirty-one".