79389 has 6 divisors (see below), whose sum is σ = 114686. Its totient is φ = 52920.

The previous prime is 79379. The next prime is 79393. The reversal of 79389 is 98397.

It can be written as a sum of positive squares in only one way, i.e., 71289 + 8100 = 267^2 + 90^2 .

It is not a de Polignac number, because 79389 - 2⁵ = 79357 is a prime.

It is a super-2 number, since 2×79389² = 12605226642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4402 + ... + 4419.

2⁷⁹³⁸⁹ is an apocalyptic number.

It is an amenable number.

79389 is a deficient number, since it is larger than the sum of its proper divisors (35297).

79389 is a wasteful number, since it uses less digits than its factorization.

79389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827 (or 8824 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 79389 is about 281.7605366264. The cubic root of 79389 is about 42.9787167073.

The spelling of 79389 in words is "seventy-nine thousand, three hundred eighty-nine".