79859599 has 4 divisors (see below), whose sum is σ = 80870560. Its totient is φ = 78848640.

The previous prime is 79859587. The next prime is 79859639. The reversal of 79859599 is 99595897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99595897 = 37 ⋅2691781.

It is a cyclic number.

It is not a de Polignac number, because 79859599 - 2¹³ = 79851407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79859539) 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, 505362 + ... + 505519.

It is an arithmetic number, because the mean of its divisors is an integer number (20217640).

Almost surely, 2^79859599 is an apocalyptic number.

79859599 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

79859599 is a deficient number, since it is larger than the sum of its proper divisors (1010961).

79859599 is a wasteful number, since it uses less digits than its factorization.

79859599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010960.

The product of its digits is 9185400, while the sum is 61.

The square root of 79859599 is about 8936.4198088496. The cubic root of 79859599 is about 430.6347197460.

The spelling of 79859599 in words is "seventy-nine million, eight hundred fifty-nine thousand, five hundred ninety-nine".