115199789 has 2 divisors, whose sum is σ = 115199790. Its totient is φ = 115199788.

The previous prime is 115199783. The next prime is 115199807. The reversal of 115199789 is 987991511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115197289 + 2500 = 10733^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 115199789 - 2²⁴ = 98422573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115199783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57599894 + 57599895.

It is an arithmetic number, because the mean of its divisors is an integer number (57599895).

Almost surely, 2^115199789 is an apocalyptic number.

It is an amenable number.

115199789 is a deficient number, since it is larger than the sum of its proper divisors (1).

115199789 is an equidigital number, since it uses as much as digits as its factorization.

115199789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 50.

The square root of 115199789 is about 10733.1164626123. The cubic root of 115199789 is about 486.5758625752.

The spelling of 115199789 in words is "one hundred fifteen million, one hundred ninety-nine thousand, seven hundred eighty-nine".