79768993 has 4 divisors (see below), whose sum is σ = 79808068. Its totient is φ = 79729920.

The previous prime is 79768987. The next prime is 79769021. The reversal of 79768993 is 39986797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69605649 + 10163344 = 8343^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 79768993 - 2⁵ = 79768961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79768933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16296 + ... + 20617.

It is an arithmetic number, because the mean of its divisors is an integer number (19952017).

Almost surely, 2^79768993 is an apocalyptic number.

It is an amenable number.

79768993 is a deficient number, since it is larger than the sum of its proper divisors (39075).

79768993 is a wasteful number, since it uses less digits than its factorization.

79768993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39074.

The product of its digits is 5143824, while the sum is 58.

The square root of 79768993 is about 8931.3488902853. The cubic root of 79768993 is about 430.4717969188.

The spelling of 79768993 in words is "seventy-nine million, seven hundred sixty-eight thousand, nine hundred ninety-three".