117979 has 2 divisors, whose sum is σ = 117980. Its totient is φ = 117978.

The previous prime is 117977. The next prime is 117989. The reversal of 117979 is 979711.

It is a happy number.

117979 is nontrivially palindromic in base 13.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117979 - 2¹ = 117977 is a prime.

Together with 117977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117973) 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 as a sum of consecutive naturals, namely, 58989 + 58990.

It is an arithmetic number, because the mean of its divisors is an integer number (58990).

2¹¹⁷⁹⁷⁹ is an apocalyptic number.

117979 is a deficient number, since it is larger than the sum of its proper divisors (1).

117979 is an equidigital number, since it uses as much as digits as its factorization.

117979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 34.

The square root of 117979 is about 343.4807127045. The cubic root of 117979 is about 49.0457714751.

The spelling of 117979 in words is "one hundred seventeen thousand, nine hundred seventy-nine".