79558859 has 4 divisors (see below), whose sum is σ = 79580904. Its totient is φ = 79536816.

The previous prime is 79558849. The next prime is 79558867. The reversal of 79558859 is 95885597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95885597 = 23 ⋅4168939.

It is a cyclic number.

It is not a de Polignac number, because 79558859 - 2⁸ = 79558603 is a prime.

It is a super-2 number, since 2×79558859² = 12659224090763762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79558849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4202 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (19895226).

Almost surely, 2^79558859 is an apocalyptic number.

79558859 is a deficient number, since it is larger than the sum of its proper divisors (22045).

79558859 is a wasteful number, since it uses less digits than its factorization.

79558859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22044.

The product of its digits is 4536000, while the sum is 56.

The square root of 79558859 is about 8919.5772881903. The cubic root of 79558859 is about 430.0934698557.

The spelling of 79558859 in words is "seventy-nine million, five hundred fifty-eight thousand, eight hundred fifty-nine".