79638199 has 4 divisors (see below), whose sum is σ = 79837200. Its totient is φ = 79439200.

The previous prime is 79638187. The next prime is 79638203. The reversal of 79638199 is 99183697.

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 79638199 - 2⁷ = 79638071 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 (79638599) 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, 98899 + ... + 99700.

It is an arithmetic number, because the mean of its divisors is an integer number (19959300).

Almost surely, 2^79638199 is an apocalyptic number.

79638199 is a deficient number, since it is larger than the sum of its proper divisors (199001).

79638199 is a wasteful number, since it uses less digits than its factorization.

79638199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199000.

The product of its digits is 734832, while the sum is 52.

The square root of 79638199 is about 8924.0237001030. The cubic root of 79638199 is about 430.2363924640.

The spelling of 79638199 in words is "seventy-nine million, six hundred thirty-eight thousand, one hundred ninety-nine".