115799889 has 8 divisors (see below), whose sum is σ = 162526240. Its totient is φ = 73136736.

The previous prime is 115799881. The next prime is 115799909. The reversal of 115799889 is 988997511.

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

It is not a de Polignac number, because 115799889 - 2³ = 115799881 is a prime.

It is a super-2 number, since 2×115799889² = 26819228584824642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2031577 = 115799889 / (1 + 1 + 5 + 7 + 9 + 9 + 8 + 8 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115799881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015732 + ... + 1015845.

It is an arithmetic number, because the mean of its divisors is an integer number (20315780).

Almost surely, 2^115799889 is an apocalyptic number.

115799889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

115799889 is a deficient number, since it is larger than the sum of its proper divisors (46726351).

115799889 is a wasteful number, since it uses less digits than its factorization.

115799889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031599.

The product of its digits is 1632960, while the sum is 57.

The square root of 115799889 is about 10761.0356843568. The cubic root of 115799889 is about 487.4192918330.

The spelling of 115799889 in words is "one hundred fifteen million, seven hundred ninety-nine thousand, eight hundred eighty-nine".