115120309 has 2 divisors, whose sum is σ = 115120310. Its totient is φ = 115120308.

The previous prime is 115120307. The next prime is 115120321. The reversal of 115120309 is 903021511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113422500 + 1697809 = 10650^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 115120309 - 2¹ = 115120307 is a prime.

Together with 115120307, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 115120309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115120303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57560154 + 57560155.

It is an arithmetic number, because the mean of its divisors is an integer number (57560155).

Almost surely, 2^115120309 is an apocalyptic number.

It is an amenable number.

115120309 is a deficient number, since it is larger than the sum of its proper divisors (1).

115120309 is an equidigital number, since it uses as much as digits as its factorization.

115120309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 115120309 is about 10729.4132644800. The cubic root of 115120309 is about 486.4639354405.

The spelling of 115120309 in words is "one hundred fifteen million, one hundred twenty thousand, three hundred nine".