115309947 has 16 divisors (see below), whose sum is σ = 157132800. Its totient is φ = 75194400.

The previous prime is 115309939. The next prime is 115309951. The reversal of 115309947 is 749903511.

It is a happy number.

It is not a de Polignac number, because 115309947 - 2³ = 115309939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115309907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33304 + ... + 36602.

It is an arithmetic number, because the mean of its divisors is an integer number (9820800).

Almost surely, 2^115309947 is an apocalyptic number.

115309947 is a deficient number, since it is larger than the sum of its proper divisors (41822853).

115309947 is a wasteful number, since it uses less digits than its factorization.

115309947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 115309947 is about 10738.2469239630. The cubic root of 115309947 is about 486.7309066906.

The spelling of 115309947 in words is "one hundred fifteen million, three hundred nine thousand, nine hundred forty-seven".