115192139 has 4 divisors (see below), whose sum is σ = 115215000. Its totient is φ = 115169280.

The previous prime is 115192111. The next prime is 115192151. The reversal of 115192139 is 931291511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931291511 = 47 ⋅19814713.

It is a cyclic number.

It is not a de Polignac number, because 115192139 - 2¹² = 115188043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115192109) 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, 182 + ... + 15179.

It is an arithmetic number, because the mean of its divisors is an integer number (28803750).

Almost surely, 2^115192139 is an apocalyptic number.

115192139 is a deficient number, since it is larger than the sum of its proper divisors (22861).

115192139 is an equidigital number, since it uses as much as digits as its factorization.

115192139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22860.

The product of its digits is 2430, while the sum is 32.

The square root of 115192139 is about 10732.7600830355. The cubic root of 115192139 is about 486.5650917576.

The spelling of 115192139 in words is "one hundred fifteen million, one hundred ninety-two thousand, one hundred thirty-nine".