139579 has 4 divisors (see below), whose sum is σ = 152280. Its totient is φ = 126880.

The previous prime is 139571. The next prime is 139589. The reversal of 139579 is 975931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 975931 = 11 ⋅88721.

It is a cyclic number.

It is not a de Polignac number, because 139579 - 2³ = 139571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139571) 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, 6334 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (38070).

2¹³⁹⁵⁷⁹ is an apocalyptic number.

139579 is a deficient number, since it is larger than the sum of its proper divisors (12701).

139579 is a wasteful number, since it uses less digits than its factorization.

139579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12700.

The product of its digits is 8505, while the sum is 34.

The square root of 139579 is about 373.6027301827. The cubic root of 139579 is about 51.8728401868.

The spelling of 139579 in words is "one hundred thirty-nine thousand, five hundred seventy-nine".