79752839 has 4 divisors (see below), whose sum is σ = 79874520. Its totient is φ = 79631160.

The previous prime is 79752821. The next prime is 79752857. The reversal of 79752839 is 93825797.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93825797 = 13 ⋅7217369.

It is an interprime number because it is at equal distance from previous prime (79752821) and next prime (79752857).

It is a cyclic number.

It is not a de Polignac number, because 79752839 - 2¹⁶ = 79687303 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 (79754839) 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 in 3 ways as a sum of consecutive naturals, for example, 59852 + ... + 61169.

It is an arithmetic number, because the mean of its divisors is an integer number (19968630).

Almost surely, 2^79752839 is an apocalyptic number.

79752839 is a deficient number, since it is larger than the sum of its proper divisors (121681).

79752839 is a wasteful number, since it uses less digits than its factorization.

79752839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121680.

The product of its digits is 952560, while the sum is 50.

The square root of 79752839 is about 8930.4445018151. Note that the first 3 decimals coincide. The cubic root of 79752839 is about 430.4427367096.

The spelling of 79752839 in words is "seventy-nine million, seven hundred fifty-two thousand, eight hundred thirty-nine".