115919 has 4 divisors (see below), whose sum is σ = 122040. Its totient is φ = 109800.

The previous prime is 115903. The next prime is 115931. The reversal of 115919 is 919511.

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 115919 - 2⁴ = 115903 is a prime.

It is a super-2 number, since 2×115919² = 26874429122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115979) 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, 3032 + ... + 3069.

It is an arithmetic number, because the mean of its divisors is an integer number (30510).

2¹¹⁵⁹¹⁹ is an apocalyptic number.

115919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

115919 is a deficient number, since it is larger than the sum of its proper divisors (6121).

115919 is an equidigital number, since it uses as much as digits as its factorization.

115919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120.

The product of its digits is 405, while the sum is 26.

The square root of 115919 is about 340.4687944585. The cubic root of 115919 is about 48.7586353320.

The spelling of 115919 in words is "one hundred fifteen thousand, nine hundred nineteen".