79930191 has 32 divisors (see below), whose sum is σ = 120349440. Its totient is φ = 46771200.

The previous prime is 79930187. The next prime is 79930223. The reversal of 79930191 is 19103997.

It is not a de Polignac number, because 79930191 - 2² = 79930187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79930091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118431 + ... + 119103.

It is an arithmetic number, because the mean of its divisors is an integer number (3760920).

Almost surely, 2^79930191 is an apocalyptic number.

79930191 is a deficient number, since it is larger than the sum of its proper divisors (40419249).

79930191 is a wasteful number, since it uses less digits than its factorization.

79930191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 79930191 is about 8940.3686165616. The cubic root of 79930191 is about 430.7615690904.

The spelling of 79930191 in words is "seventy-nine million, nine hundred thirty thousand, one hundred ninety-one".