115615109 has 2 divisors, whose sum is σ = 115615110. Its totient is φ = 115615108.

The previous prime is 115615103. The next prime is 115615139. The reversal of 115615109 is 901516511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114554209 + 1060900 = 10703^2 + 1030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115615109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115615103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57807554 + 57807555.

It is an arithmetic number, because the mean of its divisors is an integer number (57807555).

Almost surely, 2^115615109 is an apocalyptic number.

It is an amenable number.

115615109 is a deficient number, since it is larger than the sum of its proper divisors (1).

115615109 is an equidigital number, since it uses as much as digits as its factorization.

115615109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 29.

The square root of 115615109 is about 10752.4466518091. The cubic root of 115615109 is about 487.1598981344.

The spelling of 115615109 in words is "one hundred fifteen million, six hundred fifteen thousand, one hundred nine".