115978171 has 2 divisors, whose sum is σ = 115978172. Its totient is φ = 115978170.

The previous prime is 115978133. The next prime is 115978183. The reversal of 115978171 is 171879511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115978171 - 2⁷ = 115978043 is a prime.

It is a super-2 number, since 2×115978171² = 26901872297010482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115978771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57989085 + 57989086.

It is an arithmetic number, because the mean of its divisors is an integer number (57989086).

Almost surely, 2^115978171 is an apocalyptic number.

115978171 is a deficient number, since it is larger than the sum of its proper divisors (1).

115978171 is an equidigital number, since it uses as much as digits as its factorization.

115978171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 40.

The square root of 115978171 is about 10769.3161807053. The cubic root of 115978171 is about 487.6693022312.

The spelling of 115978171 in words is "one hundred fifteen million, nine hundred seventy-eight thousand, one hundred seventy-one".