115999913 has 8 divisors (see below), whose sum is σ = 120163080. Its totient is φ = 111847680.

The previous prime is 115999907. The next prime is 115999931. The reversal of 115999913 is 319999511.

It can be written as a sum of positive squares in 4 ways, for example, as 27583504 + 88416409 = 5252^2 + 9403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115999913 - 2²² = 111805609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115999973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23153 + ... + 27713.

It is an arithmetic number, because the mean of its divisors is an integer number (15020385).

Almost surely, 2^115999913 is an apocalyptic number.

It is an amenable number.

115999913 is a deficient number, since it is larger than the sum of its proper divisors (4163167).

115999913 is an equidigital number, since it uses as much as digits as its factorization.

115999913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5467.

The product of its digits is 98415, while the sum is 47.

The square root of 115999913 is about 10770.3255753946. The cubic root of 115999913 is about 487.6997741823.

It can be divided in two parts, 11599 and 9913, that added together give a palindrome (21512).

The spelling of 115999913 in words is "one hundred fifteen million, nine hundred ninety-nine thousand, nine hundred thirteen".