102109091 has 6 divisors (see below), whose sum is σ = 118780020. Its totient is φ = 87522036.

The previous prime is 102109067. The next prime is 102109093. The reversal of 102109091 is 190901201.

It is not a de Polignac number, because 102109091 - 2⁶ = 102109027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102109093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1041881 + ... + 1041978.

It is an arithmetic number, because the mean of its divisors is an integer number (19796670).

Almost surely, 2^102109091 is an apocalyptic number.

102109091 is a deficient number, since it is larger than the sum of its proper divisors (16670929).

102109091 is an equidigital number, since it uses as much as digits as its factorization.

102109091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083873 (or 2083866 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 102109091 is about 10104.9043043465. The cubic root of 102109091 is about 467.3993850599.

The spelling of 102109091 in words is "one hundred two million, one hundred nine thousand, ninety-one".