79986091 has 4 divisors (see below), whose sum is σ = 80365384. Its totient is φ = 79606800.

The previous prime is 79986077. The next prime is 79986097. The reversal of 79986091 is 19068997.

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

It is a cyclic number.

It is not a de Polignac number, because 79986091 - 2¹¹ = 79984043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79986097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189330 + ... + 189751.

It is an arithmetic number, because the mean of its divisors is an integer number (20091346).

Almost surely, 2^79986091 is an apocalyptic number.

79986091 is a deficient number, since it is larger than the sum of its proper divisors (379293).

79986091 is a wasteful number, since it uses less digits than its factorization.

79986091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379292.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 79986091 is about 8943.4943394626. The cubic root of 79986091 is about 430.8619648656.

The spelling of 79986091 in words is "seventy-nine million, nine hundred eighty-six thousand, ninety-one".