163242979 has 4 divisors (see below), whose sum is σ = 163484784. Its totient is φ = 163001176.

The previous prime is 163242977. The next prime is 163242991. The reversal of 163242979 is 979242361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979242361 = 227 ⋅4313843.

It is a cyclic number.

It is not a de Polignac number, because 163242979 - 2¹ = 163242977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163242971) 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 in 3 ways as a sum of consecutive naturals, for example, 119887 + ... + 121240.

It is an arithmetic number, because the mean of its divisors is an integer number (40871196).

Almost surely, 2^163242979 is an apocalyptic number.

163242979 is a deficient number, since it is larger than the sum of its proper divisors (241805).

163242979 is an equidigital number, since it uses as much as digits as its factorization.

163242979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241804.

The product of its digits is 163296, while the sum is 43.

The square root of 163242979 is about 12776.6575832649. The cubic root of 163242979 is about 546.5268510588.

The spelling of 163242979 in words is "one hundred sixty-three million, two hundred forty-two thousand, nine hundred seventy-nine".