79016891 has 8 divisors (see below), whose sum is σ = 82888704. Its totient is φ = 75181480.

The previous prime is 79016887. The next prime is 79016893. The reversal of 79016891 is 19861097.

It is a happy number.

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

It is not a de Polignac number, because 79016891 - 2² = 79016887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79016893) 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 7 ways as a sum of consecutive naturals, for example, 4601 + ... + 13386.

It is an arithmetic number, because the mean of its divisors is an integer number (10361088).

Almost surely, 2^79016891 is an apocalyptic number.

79016891 is a deficient number, since it is larger than the sum of its proper divisors (3871813).

79016891 is a wasteful number, since it uses less digits than its factorization.

79016891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18201.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 79016891 is about 8889.1445595175. The cubic root of 79016891 is about 429.1146213612.

The spelling of 79016891 in words is "seventy-nine million, sixteen thousand, eight hundred ninety-one".