115108309 has 4 divisors (see below), whose sum is σ = 121879404. Its totient is φ = 108337216.

The previous prime is 115108303. The next prime is 115108313. The reversal of 115108309 is 903801511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49660209 + 65448100 = 7047^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 115108309 - 2¹¹ = 115106261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115108303) 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, 3385522 + ... + 3385555.

It is an arithmetic number, because the mean of its divisors is an integer number (30469851).

Almost surely, 2^115108309 is an apocalyptic number.

It is an amenable number.

115108309 is a deficient number, since it is larger than the sum of its proper divisors (6771095).

115108309 is an equidigital number, since it uses as much as digits as its factorization.

115108309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771094.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 115108309 is about 10728.8540394583. The cubic root of 115108309 is about 486.4470320516.

The spelling of 115108309 in words is "one hundred fifteen million, one hundred eight thousand, three hundred nine".