108897091 has 2 divisors, whose sum is σ = 108897092. Its totient is φ = 108897090.

The previous prime is 108897077. The next prime is 108897109. The reversal of 108897091 is 190798801.

Together with next prime (108897109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108897091 - 2¹⁷ = 108766019 is a prime.

It is not a weakly prime, because it can be changed into another prime (108897011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54448545 + 54448546.

It is an arithmetic number, because the mean of its divisors is an integer number (54448546).

Almost surely, 2^108897091 is an apocalyptic number.

108897091 is a deficient number, since it is larger than the sum of its proper divisors (1).

108897091 is an equidigital number, since it uses as much as digits as its factorization.

108897091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 108897091 is about 10435.3768978413. The cubic root of 108897091 is about 477.5352400369.

The spelling of 108897091 in words is "one hundred eight million, eight hundred ninety-seven thousand, ninety-one".