79555993 has 4 divisors (see below), whose sum is σ = 86788368. Its totient is φ = 72323620.

The previous prime is 79555991. The next prime is 79555999. The reversal of 79555993 is 39955597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79555993 - 2¹ = 79555991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79555993.

It is not an unprimeable number, because it can be changed into a prime (79555991) 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, 3616171 + ... + 3616192.

It is an arithmetic number, because the mean of its divisors is an integer number (21697092).

Almost surely, 2^79555993 is an apocalyptic number.

It is an amenable number.

79555993 is a deficient number, since it is larger than the sum of its proper divisors (7232375).

79555993 is a wasteful number, since it uses less digits than its factorization.

79555993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232374.

The product of its digits is 1913625, while the sum is 52.

The square root of 79555993 is about 8919.4166289057. The cubic root of 79555993 is about 430.0883052824.

The spelling of 79555993 in words is "seventy-nine million, five hundred fifty-five thousand, nine hundred ninety-three".