115190891 has 2 divisors, whose sum is σ = 115190892. Its totient is φ = 115190890.

The previous prime is 115190869. The next prime is 115190903. The reversal of 115190891 is 198091511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115190891 - 2¹⁸ = 114928747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115190821) 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, 57595445 + 57595446.

It is an arithmetic number, because the mean of its divisors is an integer number (57595446).

Almost surely, 2^115190891 is an apocalyptic number.

115190891 is a deficient number, since it is larger than the sum of its proper divisors (1).

115190891 is an equidigital number, since it uses as much as digits as its factorization.

115190891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 35.

The square root of 115190891 is about 10732.7019431269. The cubic root of 115190891 is about 486.5633345907.

The spelling of 115190891 in words is "one hundred fifteen million, one hundred ninety thousand, eight hundred ninety-one".