115997 has 8 divisors (see below), whose sum is σ = 134976. Its totient is φ = 97632.

The previous prime is 115987. The next prime is 116009. The reversal of 115997 is 799511.

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 115997 - 2⁴ = 115981 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 398 + ... + 624.

It is an arithmetic number, because the mean of its divisors is an integer number (16872).

2¹¹⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

115997 is a deficient number, since it is larger than the sum of its proper divisors (18979).

115997 is an equidigital number, since it uses as much as digits as its factorization.

115997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 2835, while the sum is 32.

The square root of 115997 is about 340.5833231384. The cubic root of 115997 is about 48.7695691762.

The spelling of 115997 in words is "one hundred fifteen thousand, nine hundred ninety-seven".