79149198239 has 4 divisors (see below), whose sum is σ = 80330529624. Its totient is φ = 77967866856.

The previous prime is 79149198223. The next prime is 79149198253. The reversal of 79149198239 is 93289194197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93289194197 = 59 ⋅1581172783.

It is a cyclic number.

It is not a de Polignac number, because 79149198239 - 2⁴ = 79149198223 is a prime.

It is a super-2 number, since 2×79149198239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79149198259) 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, 590665592 + ... + 590665725.

It is an arithmetic number, because the mean of its divisors is an integer number (20082632406).

Almost surely, 2^79149198239 is an apocalyptic number.

79149198239 is a deficient number, since it is larger than the sum of its proper divisors (1181331385).

79149198239 is a wasteful number, since it uses less digits than its factorization.

79149198239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181331384.

The product of its digits is 8817984, while the sum is 62.

The spelling of 79149198239 in words is "seventy-nine billion, one hundred forty-nine million, one hundred ninety-eight thousand, two hundred thirty-nine".