80979545 has 8 divisors (see below), whose sum is σ = 97306440. Its totient is φ = 64696320.

The previous prime is 80979497. The next prime is 80979583. The reversal of 80979545 is 54597908.

It can be written as a sum of positive squares in 4 ways, for example, as 27206656 + 53772889 = 5216^2 + 7333^2 .

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

It is not a de Polignac number, because 80979545 - 2⁸ = 80979289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80979545.

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, 6686 + ... + 14375.

It is an arithmetic number, because the mean of its divisors is an integer number (12163305).

Almost surely, 2^80979545 is an apocalyptic number.

It is an amenable number.

80979545 is a deficient number, since it is larger than the sum of its proper divisors (16326895).

80979545 is a wasteful number, since it uses less digits than its factorization.

80979545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21835.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 80979545 is about 8998.8635393587. The cubic root of 80979545 is about 432.6384467729.

The spelling of 80979545 in words is "eighty million, nine hundred seventy-nine thousand, five hundred forty-five".