79539 has 4 divisors (see below), whose sum is σ = 106056. Its totient is φ = 53024.

The previous prime is 79537. The next prime is 79549. The reversal of 79539 is 93597.

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 79539 - 2¹ = 79537 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (79531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13254 + ... + 13259.

It is an arithmetic number, because the mean of its divisors is an integer number (26514).

2⁷⁹⁵³⁹ is an apocalyptic number.

79539 is a deficient number, since it is larger than the sum of its proper divisors (26517).

79539 is a wasteful number, since it uses less digits than its factorization.

79539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26516.

The product of its digits is 8505, while the sum is 33.

The square root of 79539 is about 282.0265944907. The cubic root of 79539 is about 43.0057681103.

The spelling of 79539 in words is "seventy-nine thousand, five hundred thirty-nine".