115307389 has 2 divisors, whose sum is σ = 115307390. Its totient is φ = 115307388.

The previous prime is 115307377. The next prime is 115307399. The reversal of 115307389 is 983703511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90725625 + 24581764 = 9525^2 + 4958^2 .

It is a cyclic number.

It is not a de Polignac number, because 115307389 - 2¹⁹ = 114783101 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 (115307329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57653694 + 57653695.

It is an arithmetic number, because the mean of its divisors is an integer number (57653695).

Almost surely, 2^115307389 is an apocalyptic number.

It is an amenable number.

115307389 is a deficient number, since it is larger than the sum of its proper divisors (1).

115307389 is an equidigital number, since it uses as much as digits as its factorization.

115307389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 115307389 is about 10738.1278163374. The cubic root of 115307389 is about 486.7273075016.

The spelling of 115307389 in words is "one hundred fifteen million, three hundred seven thousand, three hundred eighty-nine".