979979 has 24 divisors (see below), whose sum is σ = 1340640. Its totient is φ = 696960.

The previous prime is 979969. The next prime is 979987.

979979 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 979979 - 2¹² = 975883 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (979919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10967 + ... + 11055.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2⁹⁷⁹⁹⁷⁹ is an apocalyptic number.

979979 is a deficient number, since it is larger than the sum of its proper divisors (360661).

979979 is a wasteful number, since it uses less digits than its factorization.

979979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 120 counting only the distinct ones).

The product of its digits is 321489, while the sum is 50.

The square root of 979979 is about 989.9388870026. The cubic root of 979979 is about 99.3281293412.

The spelling of 979979 in words is "nine hundred seventy-nine thousand, nine hundred seventy-nine".