242161979 has 2 divisors, whose sum is σ = 242161980. Its totient is φ = 242161978.

The previous prime is 242161903. The next prime is 242161999. The reversal of 242161979 is 979161242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242161979 - 2⁸ = 242161723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242161999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121080989 + 121080990.

It is an arithmetic number, because the mean of its divisors is an integer number (121080990).

Almost surely, 2^242161979 is an apocalyptic number.

242161979 is a deficient number, since it is larger than the sum of its proper divisors (1).

242161979 is an equidigital number, since it uses as much as digits as its factorization.

242161979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 242161979 is about 15561.5545174639. The cubic root of 242161979 is about 623.3069734119.

The spelling of 242161979 in words is "two hundred forty-two million, one hundred sixty-one thousand, nine hundred seventy-nine".