115500979 has 4 divisors (see below), whose sum is σ = 126001080. Its totient is φ = 105000880.

The previous prime is 115500971. The next prime is 115500989. The reversal of 115500979 is 979005511.

It is a happy number.

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 115500979 - 2³ = 115500971 is a prime.

It is a super-2 number, since 2×115500979² = 26680952299916882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115500971) 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, 5250034 + ... + 5250055.

It is an arithmetic number, because the mean of its divisors is an integer number (31500270).

Almost surely, 2^115500979 is an apocalyptic number.

115500979 is a deficient number, since it is larger than the sum of its proper divisors (10500101).

115500979 is a wasteful number, since it uses less digits than its factorization.

115500979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500100.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 115500979 is about 10747.1381772079. The cubic root of 115500979 is about 486.9995446281. Note that the first 3 decimals are identical.

The spelling of 115500979 in words is "one hundred fifteen million, five hundred thousand, nine hundred seventy-nine".