78599 has 4 divisors (see below), whose sum is σ = 80136. Its totient is φ = 77064.

The previous prime is 78593. The next prime is 78607. The reversal of 78599 is 99587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99587 = 53 ⋅1879.

It is a cyclic number.

It is not a de Polignac number, because 78599 - 2⁴ = 78583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78593) 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, 689 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (20034).

2⁷⁸⁵⁹⁹ is an apocalyptic number.

78599 is a deficient number, since it is larger than the sum of its proper divisors (1537).

78599 is a wasteful number, since it uses less digits than its factorization.

78599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

The product of its digits is 22680, while the sum is 38.

The square root of 78599 is about 280.3551319309. The cubic root of 78599 is about 42.8356807884.

The spelling of 78599 in words is "seventy-eight thousand, five hundred ninety-nine".