79139 has 2 divisors, whose sum is σ = 79140. Its totient is φ = 79138.

The previous prime is 79133. The next prime is 79147. The reversal of 79139 is 93197.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39569 + 39570.

It is an arithmetic number, because the mean of its divisors is an integer number (39570).

2⁷⁹¹³⁹ is an apocalyptic number.

79139 is a deficient number, since it is larger than the sum of its proper divisors (1).

79139 is an equidigital number, since it uses as much as digits as its factorization.

79139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701, while the sum is 29.

The square root of 79139 is about 281.3165476825. The cubic root of 79139 is about 42.9335552136.

It can be divided in two parts, 7913 and 9, that multiplied together give a palindrome (71217).

The spelling of 79139 in words is "seventy-nine thousand, one hundred thirty-nine".