115289287 has 2 divisors, whose sum is σ = 115289288. Its totient is φ = 115289286.

The previous prime is 115289269. The next prime is 115289309. The reversal of 115289287 is 782982511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115289287 - 2¹⁹ = 114764999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115289227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57644643 + 57644644.

It is an arithmetic number, because the mean of its divisors is an integer number (57644644).

Almost surely, 2^115289287 is an apocalyptic number.

115289287 is a deficient number, since it is larger than the sum of its proper divisors (1).

115289287 is an equidigital number, since it uses as much as digits as its factorization.

115289287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 43.

The square root of 115289287 is about 10737.2848988932. The cubic root of 115289287 is about 486.7018358792.

The spelling of 115289287 in words is "one hundred fifteen million, two hundred eighty-nine thousand, two hundred eighty-seven".