115399 has 2 divisors, whose sum is σ = 115400. Its totient is φ = 115398.

The previous prime is 115363. The next prime is 115421. The reversal of 115399 is 993511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57699 + 57700.

It is an arithmetic number, because the mean of its divisors is an integer number (57700).

2¹¹⁵³⁹⁹ is an apocalyptic number.

115399 is a deficient number, since it is larger than the sum of its proper divisors (1).

115399 is an equidigital number, since it uses as much as digits as its factorization.

115399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 28.

The square root of 115399 is about 339.7042831640. The cubic root of 115399 is about 48.6856173981.

It can be divided in two parts, 1 and 15399, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 115399 in words is "one hundred fifteen thousand, three hundred ninety-nine".