115999817 has 2 divisors, whose sum is σ = 115999818. Its totient is φ = 115999816.

The previous prime is 115999759. The next prime is 115999837. The reversal of 115999817 is 718999511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94692361 + 21307456 = 9731^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 115999817 - 2⁶ = 115999753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115999837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57999908 + 57999909.

It is an arithmetic number, because the mean of its divisors is an integer number (57999909).

Almost surely, 2^115999817 is an apocalyptic number.

It is an amenable number.

115999817 is a deficient number, since it is larger than the sum of its proper divisors (1).

115999817 is an equidigital number, since it uses as much as digits as its factorization.

115999817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 50.

The square root of 115999817 is about 10770.3211187039. The cubic root of 115999817 is about 487.6996396443.

The spelling of 115999817 in words is "one hundred fifteen million, nine hundred ninety-nine thousand, eight hundred seventeen".