122979 has 4 divisors (see below), whose sum is σ = 163976. Its totient is φ = 81984.

The previous prime is 122971. The next prime is 123001. The reversal of 122979 is 979221.

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

It is not a de Polignac number, because 122979 - 2³ = 122971 is a prime.

It is a D-number.

It is a Duffinian number.

122979 is a lucky number.

It is a plaindrome in base 15.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (122971) 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, 20494 + ... + 20499.

It is an arithmetic number, because the mean of its divisors is an integer number (40994).

2¹²²⁹⁷⁹ is an apocalyptic number.

122979 is a deficient number, since it is larger than the sum of its proper divisors (40997).

122979 is an equidigital number, since it uses as much as digits as its factorization.

122979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40996.

The product of its digits is 2268, while the sum is 30.

The square root of 122979 is about 350.6836180947. The cubic root of 122979 is about 49.7290679010.

The spelling of 122979 in words is "one hundred twenty-two thousand, nine hundred seventy-nine".