79191 has 16 divisors (see below), whose sum is σ = 134400. Its totient is φ = 45144.

The previous prime is 79187. The next prime is 79193. The reversal of 79191 is 19197.

It is not a de Polignac number, because 79191 - 2² = 79187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 398.

It is an arithmetic number, because the mean of its divisors is an integer number (8400).

2⁷⁹¹⁹¹ is an apocalyptic number.

79191 is a deficient number, since it is larger than the sum of its proper divisors (55209).

79191 is a wasteful number, since it uses less digits than its factorization.

79191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 429 counting only the distinct ones).

The product of its digits is 567, while the sum is 27.

The square root of 79191 is about 281.4089550814. The cubic root of 79191 is about 42.9429566300.

The spelling of 79191 in words is "seventy-nine thousand, one hundred ninety-one".