115172117 has 2 divisors, whose sum is σ = 115172118. Its totient is φ = 115172116.

The previous prime is 115172107. The next prime is 115172119. The reversal of 115172117 is 711271511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94750756 + 20421361 = 9734^2 + 4519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115172117 is a prime.

Together with 115172119, 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 (115172119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57586058 + 57586059.

It is an arithmetic number, because the mean of its divisors is an integer number (57586059).

Almost surely, 2^115172117 is an apocalyptic number.

It is an amenable number.

115172117 is a deficient number, since it is larger than the sum of its proper divisors (1).

115172117 is an equidigital number, since it uses as much as digits as its factorization.

115172117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 490, while the sum is 26.

The square root of 115172117 is about 10731.8272908205. The cubic root of 115172117 is about 486.5368995249.

The spelling of 115172117 in words is "one hundred fifteen million, one hundred seventy-two thousand, one hundred seventeen".