115400291 has 2 divisors, whose sum is σ = 115400292. Its totient is φ = 115400290.

The previous prime is 115400279. The next prime is 115400293. The reversal of 115400291 is 192004511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115400291 is a prime.

Together with 115400293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115400293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57700145 + 57700146.

It is an arithmetic number, because the mean of its divisors is an integer number (57700146).

Almost surely, 2^115400291 is an apocalyptic number.

115400291 is a deficient number, since it is larger than the sum of its proper divisors (1).

115400291 is an equidigital number, since it uses as much as digits as its factorization.

115400291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 115400291 is about 10742.4527459980. The cubic root of 115400291 is about 486.8579895052.

The spelling of 115400291 in words is "one hundred fifteen million, four hundred thousand, two hundred ninety-one".