90686832631 has 2 divisors, whose sum is σ = 90686832632. Its totient is φ = 90686832630.

The previous prime is 90686832617. The next prime is 90686832637. The reversal of 90686832631 is 13623868609.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90686832631 is a prime.

It is a super-2 number, since 2×90686832631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90686832637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45343416315 + 45343416316.

It is an arithmetic number, because the mean of its divisors is an integer number (45343416316).

Almost surely, 2^90686832631 is an apocalyptic number.

90686832631 is a deficient number, since it is larger than the sum of its proper divisors (1).

90686832631 is an equidigital number, since it uses as much as digits as its factorization.

90686832631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 90686832631 in words is "ninety billion, six hundred eighty-six million, eight hundred thirty-two thousand, six hundred thirty-one".