163979 has 2 divisors, whose sum is σ = 163980. Its totient is φ = 163978.

The previous prime is 163973. The next prime is 163981. The reversal of 163979 is 979361.

It is a strong prime.

It is an emirp because it is prime and its reverse (979361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163979 - 2¹⁶ = 98443 is a prime.

It is a super-2 number, since 2×163979² = 53778224882, which contains 22 as substring.

Together with 163981, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (163973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81989 + 81990.

It is an arithmetic number, because the mean of its divisors is an integer number (81990).

2¹⁶³⁹⁷⁹ is an apocalyptic number.

163979 is a deficient number, since it is larger than the sum of its proper divisors (1).

163979 is an equidigital number, since it uses as much as digits as its factorization.

163979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 163979 is about 404.9432058944. The cubic root of 163979 is about 54.7347003113.

The spelling of 163979 in words is "one hundred sixty-three thousand, nine hundred seventy-nine".