78659 has 8 divisors (see below), whose sum is σ = 95328. Its totient is φ = 63360.

The previous prime is 78653. The next prime is 78691. The reversal of 78659 is 95687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78659 - 2⁴ = 78643 is a prime.

It is a d-powerful number, because it can be written as 7 + 8³ + 6 + 5⁷ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 449.

It is an arithmetic number, because the mean of its divisors is an integer number (11916).

78659 is a Friedman number, since it can be written as 89*6+5^7, using all its digits and the basic arithmetic operations.

2⁷⁸⁶⁵⁹ is an apocalyptic number.

78659 is a deficient number, since it is larger than the sum of its proper divisors (16669).

78659 is a wasteful number, since it uses less digits than its factorization.

78659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 15120, while the sum is 35.

The square root of 78659 is about 280.4621186542. The cubic root of 78659 is about 42.8465778190.

It can be divided in two parts, 78 and 659, that added together give a palindrome (737).

The spelling of 78659 in words is "seventy-eight thousand, six hundred fifty-nine".