115171997 has 2 divisors, whose sum is σ = 115171998. Its totient is φ = 115171996.

The previous prime is 115171933. The next prime is 115171999. The reversal of 115171997 is 799171511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103652761 + 11519236 = 10181^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 115171997 - 2⁶ = 115171933 is a prime.

Together with 115171999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115171999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57585998 + 57585999.

It is an arithmetic number, because the mean of its divisors is an integer number (57585999).

Almost surely, 2^115171997 is an apocalyptic number.

It is an amenable number.

115171997 is a deficient number, since it is larger than the sum of its proper divisors (1).

115171997 is an equidigital number, since it uses as much as digits as its factorization.

115171997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19845, while the sum is 41.

The square root of 115171997 is about 10731.8216999725. The cubic root of 115171997 is about 486.5367305475.

The spelling of 115171997 in words is "one hundred fifteen million, one hundred seventy-one thousand, nine hundred ninety-seven".