168613979 has 2 divisors, whose sum is σ = 168613980. Its totient is φ = 168613978.

The previous prime is 168613933. The next prime is 168613997. The reversal of 168613979 is 979316861.

Together with next prime (168613997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (979316861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168613979 - 2²⁰ = 167565403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168613579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84306989 + 84306990.

It is an arithmetic number, because the mean of its divisors is an integer number (84306990).

Almost surely, 2^168613979 is an apocalyptic number.

168613979 is a deficient number, since it is larger than the sum of its proper divisors (1).

168613979 is an equidigital number, since it uses as much as digits as its factorization.

168613979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 168613979 is about 12985.1445506009. The cubic root of 168613979 is about 552.4562091375.

The spelling of 168613979 in words is "one hundred sixty-eight million, six hundred thirteen thousand, nine hundred seventy-nine".