80979361 has 4 divisors (see below), whose sum is σ = 81031300. Its totient is φ = 80927424.

The previous prime is 80979359. The next prime is 80979373. The reversal of 80979361 is 16397908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37748736 + 43230625 = 6144^2 + 6575^2 .

It is a cyclic number.

It is not a de Polignac number, because 80979361 - 2¹ = 80979359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80979061) 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 3 ways as a sum of consecutive naturals, for example, 23556 + ... + 26773.

It is an arithmetic number, because the mean of its divisors is an integer number (20257825).

Almost surely, 2^80979361 is an apocalyptic number.

It is an amenable number.

80979361 is a deficient number, since it is larger than the sum of its proper divisors (51939).

80979361 is a wasteful number, since it uses less digits than its factorization.

80979361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51938.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 80979361 is about 8998.8533158397. The cubic root of 80979361 is about 432.6381190954.

The spelling of 80979361 in words is "eighty million, nine hundred seventy-nine thousand, three hundred sixty-one".