109100091 has 8 divisors (see below), whose sum is σ = 147515904. Its totient is φ = 71708840.

The previous prime is 109100083. The next prime is 109100111. The reversal of 109100091 is 190001901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109100091 - 2³ = 109100083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109100011) 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 7 ways as a sum of consecutive naturals, for example, 255891 + ... + 256316.

It is an arithmetic number, because the mean of its divisors is an integer number (18439488).

Almost surely, 2^109100091 is an apocalyptic number.

109100091 is a deficient number, since it is larger than the sum of its proper divisors (38415813).

109100091 is an equidigital number, since it uses as much as digits as its factorization.

109100091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512281.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 109100091 is about 10445.0988985265. The cubic root of 109100091 is about 477.8317875345.

Adding to 109100091 its reverse (190001901), we get a palindrome (299101992).

The spelling of 109100091 in words is "one hundred nine million, one hundred thousand, ninety-one".