80939 has 4 divisors (see below), whose sum is σ = 83760. Its totient is φ = 78120.

The previous prime is 80933. The next prime is 80953. The reversal of 80939 is 93908.

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 80939 - 2⁴ = 80923 is a prime.

It is a super-2 number, since 2×80939² = 13102243442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2791 = 80939 / (8 + 0 + 9 + 3 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80933) 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, 1367 + ... + 1424.

It is an arithmetic number, because the mean of its divisors is an integer number (20940).

2⁸⁰⁹³⁹ is an apocalyptic number.

80939 is a deficient number, since it is larger than the sum of its proper divisors (2821).

80939 is a wasteful number, since it uses less digits than its factorization.

80939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 80939 is about 284.4978031550. The cubic root of 80939 is about 43.2566229959.

It can be divided in two parts, 809 and 39, that added together give a palindrome (848).

The spelling of 80939 in words is "eighty thousand, nine hundred thirty-nine".