80139 has 4 divisors (see below), whose sum is σ = 106856. Its totient is φ = 53424.

The previous prime is 80111. The next prime is 80141. The reversal of 80139 is 93108.

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

It is not a de Polignac number, because 80139 - 2⁵ = 80107 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80149) 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, 13354 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (26714).

2⁸⁰¹³⁹ is an apocalyptic number.

80139 is a deficient number, since it is larger than the sum of its proper divisors (26717).

80139 is a wasteful number, since it uses less digits than its factorization.

80139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26716.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 80139 is about 283.0883254393. The cubic root of 80139 is about 43.1136348963.

The spelling of 80139 in words is "eighty thousand, one hundred thirty-nine".