115189409 has 2 divisors, whose sum is σ = 115189410. Its totient is φ = 115189408.

The previous prime is 115189391. The next prime is 115189423. The reversal of 115189409 is 904981511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112954384 + 2235025 = 10628^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 115189409 - 2²⁰ = 114140833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115189469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57594704 + 57594705.

It is an arithmetic number, because the mean of its divisors is an integer number (57594705).

Almost surely, 2^115189409 is an apocalyptic number.

It is an amenable number.

115189409 is a deficient number, since it is larger than the sum of its proper divisors (1).

115189409 is an equidigital number, since it uses as much as digits as its factorization.

115189409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 115189409 is about 10732.6329015764. The cubic root of 115189409 is about 486.5612479386.

The spelling of 115189409 in words is "one hundred fifteen million, one hundred eighty-nine thousand, four hundred nine".