115781017 has 4 divisors (see below), whose sum is σ = 126306576. Its totient is φ = 105255460.

The previous prime is 115781009. The next prime is 115781027. The reversal of 115781017 is 710187511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115781017 - 2³ = 115781009 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 115781017.

It is not an unprimeable number, because it can be changed into a prime (115781027) 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, 5262763 + ... + 5262784.

It is an arithmetic number, because the mean of its divisors is an integer number (31576644).

Almost surely, 2^115781017 is an apocalyptic number.

It is an amenable number.

115781017 is a deficient number, since it is larger than the sum of its proper divisors (10525559).

115781017 is a wasteful number, since it uses less digits than its factorization.

115781017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10525558.

The product of its (nonzero) digits is 1960, while the sum is 31.

The square root of 115781017 is about 10760.1587813563. The cubic root of 115781017 is about 487.3928120246.

The spelling of 115781017 in words is "one hundred fifteen million, seven hundred eighty-one thousand, seventeen".