79551191 has 4 divisors (see below), whose sum is σ = 80158584. Its totient is φ = 78943800.

The previous prime is 79551163. The next prime is 79551203. The reversal of 79551191 is 19115597.

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 79551191 - 2⁶ = 79551127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79551151) 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, 303500 + ... + 303761.

It is an arithmetic number, because the mean of its divisors is an integer number (20039646).

Almost surely, 2^79551191 is an apocalyptic number.

79551191 is a deficient number, since it is larger than the sum of its proper divisors (607393).

79551191 is a wasteful number, since it uses less digits than its factorization.

79551191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607392.

The product of its digits is 14175, while the sum is 38.

The square root of 79551191 is about 8919.1474368350. The cubic root of 79551191 is about 430.0796517311.

The spelling of 79551191 in words is "seventy-nine million, five hundred fifty-one thousand, one hundred ninety-one".