109085591 has 2 divisors, whose sum is σ = 109085592. Its totient is φ = 109085590.

The previous prime is 109085551. The next prime is 109085633. The reversal of 109085591 is 195580901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109085591 - 2¹⁸ = 108823447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109085551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54542795 + 54542796.

It is an arithmetic number, because the mean of its divisors is an integer number (54542796).

Almost surely, 2^109085591 is an apocalyptic number.

109085591 is a deficient number, since it is larger than the sum of its proper divisors (1).

109085591 is an equidigital number, since it uses as much as digits as its factorization.

109085591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 109085591 is about 10444.4047700192. The cubic root of 109085591 is about 477.8106177755.

The spelling of 109085591 in words is "one hundred nine million, eighty-five thousand, five hundred ninety-one".