80990631 has 16 divisors (see below), whose sum is σ = 123857920. Its totient is φ = 52251480.

The previous prime is 80990627. The next prime is 80990639. The reversal of 80990631 is 13609908.

It is not a de Polignac number, because 80990631 - 2² = 80990627 is a prime.

It is a super-2 number, since 2×80990631² = 13118964619556322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80990639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47545 + ... + 49218.

It is an arithmetic number, because the mean of its divisors is an integer number (7741120).

Almost surely, 2^80990631 is an apocalyptic number.

80990631 is a deficient number, since it is larger than the sum of its proper divisors (42867289).

80990631 is a wasteful number, since it uses less digits than its factorization.

80990631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96803 (or 96797 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 80990631 is about 8999.4794849480. The cubic root of 80990631 is about 432.6581884290.

The spelling of 80990631 in words is "eighty million, nine hundred ninety thousand, six hundred thirty-one".