79969993 has 4 divisors (see below), whose sum is σ = 84178960. Its totient is φ = 75761028.

The previous prime is 79969979. The next prime is 79969997. The reversal of 79969993 is 39996997.

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 79969993 - 2⁵ = 79969961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79969997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2104455 + ... + 2104492.

It is an arithmetic number, because the mean of its divisors is an integer number (21044740).

Almost surely, 2^79969993 is an apocalyptic number.

It is an amenable number.

79969993 is a deficient number, since it is larger than the sum of its proper divisors (4208967).

79969993 is a wasteful number, since it uses less digits than its factorization.

79969993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208966.

The product of its digits is 7440174, while the sum is 61.

The square root of 79969993 is about 8942.5943103777. The cubic root of 79969993 is about 430.8330578344.

The spelling of 79969993 in words is "seventy-nine million, nine hundred sixty-nine thousand, nine hundred ninety-three".