79242239 has 4 divisors (see below), whose sum is σ = 81974760. Its totient is φ = 76509720.

The previous prime is 79242227. The next prime is 79242257. The reversal of 79242239 is 93224297.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79242239 - 2¹² = 79238143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79242439) 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, 1366217 + ... + 1366274.

It is an arithmetic number, because the mean of its divisors is an integer number (20493690).

Almost surely, 2^79242239 is an apocalyptic number.

79242239 is a deficient number, since it is larger than the sum of its proper divisors (2732521).

79242239 is a wasteful number, since it uses less digits than its factorization.

79242239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732520.

The product of its digits is 54432, while the sum is 38.

The square root of 79242239 is about 8901.8109955222. The cubic root of 79242239 is about 429.5221643544.

The spelling of 79242239 in words is "seventy-nine million, two hundred forty-two thousand, two hundred thirty-nine".