115317391 has 4 divisors (see below), whose sum is σ = 131791312. Its totient is φ = 98843472.

The previous prime is 115317361. The next prime is 115317413. The reversal of 115317391 is 193713511.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 115317391 - 2¹⁹ = 114793103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115317361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8236950 + ... + 8236963.

It is an arithmetic number, because the mean of its divisors is an integer number (32947828).

Almost surely, 2^115317391 is an apocalyptic number.

115317391 is a deficient number, since it is larger than the sum of its proper divisors (16473921).

115317391 is an equidigital number, since it uses as much as digits as its factorization.

115317391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16473920.

The product of its digits is 2835, while the sum is 31.

The square root of 115317391 is about 10738.5935298809. The cubic root of 115317391 is about 486.7413803372.

The spelling of 115317391 in words is "one hundred fifteen million, three hundred seventeen thousand, three hundred ninety-one".