162681979 has 2 divisors, whose sum is σ = 162681980. Its totient is φ = 162681978.

The previous prime is 162681947. The next prime is 162682001. The reversal of 162681979 is 979186261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162681979 - 2⁵ = 162681947 is a prime.

It is not a weakly prime, because it can be changed into another prime (162681179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81340989 + 81340990.

It is an arithmetic number, because the mean of its divisors is an integer number (81340990).

Almost surely, 2^162681979 is an apocalyptic number.

162681979 is a deficient number, since it is larger than the sum of its proper divisors (1).

162681979 is an equidigital number, since it uses as much as digits as its factorization.

162681979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 162681979 is about 12754.6845903770. The cubic root of 162681979 is about 545.9000687020.

The spelling of 162681979 in words is "one hundred sixty-two million, six hundred eighty-one thousand, nine hundred seventy-nine".