80997365 has 8 divisors (see below), whose sum is σ = 97262808. Its totient is φ = 64753920.

The previous prime is 80997359. The next prime is 80997373. The reversal of 80997365 is 56379908.

It can be written as a sum of positive squares in 4 ways, for example, as 9746884 + 71250481 = 3122^2 + 8441^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-80997365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4145 + ... + 13385.

It is an arithmetic number, because the mean of its divisors is an integer number (12157851).

Almost surely, 2^80997365 is an apocalyptic number.

It is an amenable number.

80997365 is a deficient number, since it is larger than the sum of its proper divisors (16265443).

80997365 is a wasteful number, since it uses less digits than its factorization.

80997365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10999.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 80997365 is about 8999.8536099206. The cubic root of 80997365 is about 432.6701792789.

The spelling of 80997365 in words is "eighty million, nine hundred ninety-seven thousand, three hundred sixty-five".