80979 has 4 divisors (see below), whose sum is σ = 107976. Its totient is φ = 53984.

The previous prime is 80963. The next prime is 80989. The reversal of 80979 is 97908.

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

It is a cyclic number.

It is not a de Polignac number, because 80979 - 2⁴ = 80963 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (80909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13494 + ... + 13499.

It is an arithmetic number, because the mean of its divisors is an integer number (26994).

2⁸⁰⁹⁷⁹ is an apocalyptic number.

80979 is a deficient number, since it is larger than the sum of its proper divisors (26997).

80979 is a wasteful number, since it uses less digits than its factorization.

80979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26996.

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

The square root of 80979 is about 284.5680937842. The cubic root of 80979 is about 43.2637476205.

It can be divided in two parts, 809 and 79, that added together give a palindrome (888).

The spelling of 80979 in words is "eighty thousand, nine hundred seventy-nine".