80591997 has 8 divisors (see below), whose sum is σ = 107635456. Its totient is φ = 53638272.

The previous prime is 80591989. The next prime is 80591999. The reversal of 80591997 is 79919508.

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

It is not a de Polignac number, because 80591997 - 2³ = 80591989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80591999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20308 + ... + 23949.

It is an arithmetic number, because the mean of its divisors is an integer number (13454432).

Almost surely, 2^80591997 is an apocalyptic number.

It is an amenable number.

80591997 is a deficient number, since it is larger than the sum of its proper divisors (27043459).

80591997 is a wasteful number, since it uses less digits than its factorization.

80591997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44867.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 80591997 is about 8977.3045509217. The cubic root of 80591997 is about 431.9471761114.

The spelling of 80591997 in words is "eighty million, five hundred ninety-one thousand, nine hundred ninety-seven".