79979893 has 8 divisors (see below), whose sum is σ = 91461888. Its totient is φ = 68511984.

The previous prime is 79979831. The next prime is 79979899. The reversal of 79979893 is 39897997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79979893 - 2²¹ = 77882741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79979899) 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 7 ways as a sum of consecutive naturals, for example, 15555 + ... + 20047.

It is an arithmetic number, because the mean of its divisors is an integer number (11432736).

Almost surely, 2^79979893 is an apocalyptic number.

It is an amenable number.

79979893 is a deficient number, since it is larger than the sum of its proper divisors (11481995).

79979893 is a wasteful number, since it uses less digits than its factorization.

79979893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043.

The product of its digits is 7715736, while the sum is 61.

The square root of 79979893 is about 8943.1478238929. The cubic root of 79979893 is about 430.8508356330.

The spelling of 79979893 in words is "seventy-nine million, nine hundred seventy-nine thousand, eight hundred ninety-three".