80931961 has 8 divisors (see below), whose sum is σ = 89499744. Its totient is φ = 72565920.

The previous prime is 80931959. The next prime is 80931973. The reversal of 80931961 is 16913908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80931961 - 2¹ = 80931959 is a prime.

It is a super-2 number, since 2×80931961² = 13099964622611042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80931961.

It is not an unprimeable number, because it can be changed into a prime (80931161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49591 + ... + 51196.

It is an arithmetic number, because the mean of its divisors is an integer number (11187468).

Almost surely, 2^80931961 is an apocalyptic number.

It is an amenable number.

80931961 is a deficient number, since it is larger than the sum of its proper divisors (8567783).

80931961 is a wasteful number, since it uses less digits than its factorization.

80931961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100871.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 80931961 is about 8996.2192614453. The cubic root of 80931961 is about 432.5536899723.

The spelling of 80931961 in words is "eighty million, nine hundred thirty-one thousand, nine hundred sixty-one".