80974989 has 18 divisors (see below), whose sum is σ = 121214730. Its totient is φ = 52028256.

The previous prime is 80974969. The next prime is 80974991. The reversal of 80974989 is 98947908.

It can be written as a sum of positive squares in 3 ways, for example, as 514089 + 80460900 = 717^2 + 8970^2 .

It is not a de Polignac number, because 80974989 - 2²⁴ = 64197773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80974909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 145099 + ... + 145655.

Almost surely, 2^80974989 is an apocalyptic number.

It is an amenable number.

80974989 is a deficient number, since it is larger than the sum of its proper divisors (40239741).

80974989 is an equidigital number, since it uses as much as digits as its factorization.

80974989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 80974989 is about 8998.6103927218. The cubic root of 80974989 is about 432.6303330461.

The spelling of 80974989 in words is "eighty million, nine hundred seventy-four thousand, nine hundred eighty-nine".