115398163 has 4 divisors (see below), whose sum is σ = 119377440. Its totient is φ = 111418888.

The previous prime is 115398161. The next prime is 115398203. The reversal of 115398163 is 361893511.

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

It is a cyclic number.

It is not a de Polignac number, because 115398163 - 2¹ = 115398161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115398161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989595 + ... + 1989652.

It is an arithmetic number, because the mean of its divisors is an integer number (29844360).

Almost surely, 2^115398163 is an apocalyptic number.

115398163 is a deficient number, since it is larger than the sum of its proper divisors (3979277).

115398163 is an equidigital number, since it uses as much as digits as its factorization.

115398163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979276.

The product of its digits is 19440, while the sum is 37.

The square root of 115398163 is about 10742.3536992598. The cubic root of 115398163 is about 486.8549969069.

It can be divided in two parts, 115 and 398163, that added together give a triangular number (398278 = T₈₉₂).

The spelling of 115398163 in words is "one hundred fifteen million, three hundred ninety-eight thousand, one hundred sixty-three".