115809147 has 6 divisors (see below), whose sum is σ = 167279892. Its totient is φ = 77206092.

The previous prime is 115809143. The next prime is 115809179. The reversal of 115809147 is 741908511.

It is not a de Polignac number, because 115809147 - 2² = 115809143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115809143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6433833 + ... + 6433850.

It is an arithmetic number, because the mean of its divisors is an integer number (27879982).

Almost surely, 2^115809147 is an apocalyptic number.

115809147 is a deficient number, since it is larger than the sum of its proper divisors (51470745).

115809147 is a wasteful number, since it uses less digits than its factorization.

115809147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12867689 (or 12867686 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 115809147 is about 10761.4658388158. The cubic root of 115809147 is about 487.4322809288.

The spelling of 115809147 in words is "one hundred fifteen million, eight hundred nine thousand, one hundred forty-seven".