115917 has 4 divisors (see below), whose sum is σ = 154560. Its totient is φ = 77276.

The previous prime is 115903. The next prime is 115931. The reversal of 115917 is 719511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (115903) and next prime (115931).

It is a cyclic number.

It is not a de Polignac number, because 115917 - 2⁴ = 115901 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 115917.

It is not an unprimeable number, because it can be changed into a prime (115987) 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, 19317 + ... + 19322.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2¹¹⁵⁹¹⁷ is an apocalyptic number.

It is an amenable number.

115917 is a deficient number, since it is larger than the sum of its proper divisors (38643).

115917 is an equidigital number, since it uses as much as digits as its factorization.

115917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38642.

The product of its digits is 315, while the sum is 24.

The square root of 115917 is about 340.4658573191. The cubic root of 115917 is about 48.7583549125.

It can be divided in two parts, 1159 and 17, that added together give a triangular number (1176 = T₄₈).

The spelling of 115917 in words is "one hundred fifteen thousand, nine hundred seventeen".