115161289 has 2 divisors, whose sum is σ = 115161290. Its totient is φ = 115161288.

The previous prime is 115161287. The next prime is 115161301. The reversal of 115161289 is 982161511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82955664 + 32205625 = 9108^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 115161289 - 2¹ = 115161287 is a prime.

Together with 115161287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115161287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57580644 + 57580645.

It is an arithmetic number, because the mean of its divisors is an integer number (57580645).

Almost surely, 2^115161289 is an apocalyptic number.

It is an amenable number.

115161289 is a deficient number, since it is larger than the sum of its proper divisors (1).

115161289 is an equidigital number, since it uses as much as digits as its factorization.

115161289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 34.

The square root of 115161289 is about 10731.3227982388. The cubic root of 115161289 is about 486.5216516600.

The spelling of 115161289 in words is "one hundred fifteen million, one hundred sixty-one thousand, two hundred eighty-nine".