80997 has 24 divisors (see below), whose sum is σ = 136800. Its totient is φ = 42336.

The previous prime is 80989. The next prime is 81001. The reversal of 80997 is 79908.

It is not a de Polignac number, because 80997 - 2³ = 80989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2779 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (5700).

2⁸⁰⁹⁹⁷ is an apocalyptic number.

80997 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

80997 is a deficient number, since it is larger than the sum of its proper divisors (55803).

80997 is a wasteful number, since it uses less digits than its factorization.

80997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 80997 is about 284.5997189036. The cubic root of 80997 is about 43.2669529361.

Subtracting from 80997 its reverse (79908), we obtain a square (1089 = 33²).

The spelling of 80997 in words is "eighty thousand, nine hundred ninety-seven".