115289399 has 2 divisors, whose sum is σ = 115289400. Its totient is φ = 115289398.

The previous prime is 115289381. The next prime is 115289401. The reversal of 115289399 is 993982511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115289399 - 2¹⁶ = 115223863 is a prime.

Together with 115289401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115289309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57644699 + 57644700.

It is an arithmetic number, because the mean of its divisors is an integer number (57644700).

Almost surely, 2^115289399 is an apocalyptic number.

115289399 is a deficient number, since it is larger than the sum of its proper divisors (1).

115289399 is an equidigital number, since it uses as much as digits as its factorization.

115289399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 115289399 is about 10737.2901143631. The cubic root of 115289399 is about 486.7019934845.

The spelling of 115289399 in words is "one hundred fifteen million, two hundred eighty-nine thousand, three hundred ninety-nine".