115979197 has 4 divisors (see below), whose sum is σ = 116718076. Its totient is φ = 115240320.

The previous prime is 115979167. The next prime is 115979231. The reversal of 115979197 is 791979511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41139396 + 74839801 = 6414^2 + 8651^2 .

It is a cyclic number.

It is not a de Polignac number, because 115979197 - 2¹⁵ = 115946429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115979197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115979107) 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, 369204 + ... + 369517.

It is an arithmetic number, because the mean of its divisors is an integer number (29179519).

Almost surely, 2^115979197 is an apocalyptic number.

It is an amenable number.

115979197 is a deficient number, since it is larger than the sum of its proper divisors (738879).

115979197 is an equidigital number, since it uses as much as digits as its factorization.

115979197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738878.

The product of its digits is 178605, while the sum is 49.

The square root of 115979197 is about 10769.3638159364. The cubic root of 115979197 is about 487.6707402812.

The spelling of 115979197 in words is "one hundred fifteen million, nine hundred seventy-nine thousand, one hundred ninety-seven".