79198531 has 4 divisors (see below), whose sum is σ = 79600752. Its totient is φ = 78796312.

The previous prime is 79198523. The next prime is 79198543. The reversal of 79198531 is 13589197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13589197 = 29 ⋅468593.

It is a cyclic number.

It is not a de Polignac number, because 79198531 - 2³ = 79198523 is a prime.

It is a super-2 number, since 2×79198531² = 12544814625115922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79198571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200815 + ... + 201208.

It is an arithmetic number, because the mean of its divisors is an integer number (19900188).

Almost surely, 2^79198531 is an apocalyptic number.

79198531 is a deficient number, since it is larger than the sum of its proper divisors (402221).

79198531 is a wasteful number, since it uses less digits than its factorization.

79198531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402220.

The product of its digits is 68040, while the sum is 43.

The square root of 79198531 is about 8899.3556508323. The cubic root of 79198531 is about 429.4431786698.

The spelling of 79198531 in words is "seventy-nine million, one hundred ninety-eight thousand, five hundred thirty-one".