115289897 has 2 divisors, whose sum is σ = 115289898. Its totient is φ = 115289896.

The previous prime is 115289879. The next prime is 115289917. The reversal of 115289897 is 798982511.

Together with previous prime (115289879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 885481 = 10696^2 + 941^2 .

It is an emirp because it is prime and its reverse (798982511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115289897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115289807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57644948 + 57644949.

It is an arithmetic number, because the mean of its divisors is an integer number (57644949).

Almost surely, 2^115289897 is an apocalyptic number.

It is an amenable number.

115289897 is a deficient number, since it is larger than the sum of its proper divisors (1).

115289897 is an equidigital number, since it uses as much as digits as its factorization.

115289897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 50.

The square root of 115289897 is about 10737.3133045469. The cubic root of 115289897 is about 486.7026942637.

The spelling of 115289897 in words is "one hundred fifteen million, two hundred eighty-nine thousand, eight hundred ninety-seven".