115439789 has 2 divisors, whose sum is σ = 115439790. Its totient is φ = 115439788.

The previous prime is 115439773. The next prime is 115439837. The reversal of 115439789 is 987934511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99102025 + 16337764 = 9955^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 115439789 - 2⁴ = 115439773 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 (115439729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57719894 + 57719895.

It is an arithmetic number, because the mean of its divisors is an integer number (57719895).

Almost surely, 2^115439789 is an apocalyptic number.

It is an amenable number.

115439789 is a deficient number, since it is larger than the sum of its proper divisors (1).

115439789 is an equidigital number, since it uses as much as digits as its factorization.

115439789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 115439789 is about 10744.2909956870. The cubic root of 115439789 is about 486.9135287163.

The spelling of 115439789 in words is "one hundred fifteen million, four hundred thirty-nine thousand, seven hundred eighty-nine".