109809091 has 8 divisors (see below), whose sum is σ = 125871200. Its totient is φ = 93840768.

The previous prime is 109809079. The next prime is 109809101. The reversal of 109809091 is 190908901.

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

It is not a de Polignac number, because 109809091 - 2⁵ = 109809059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109809091.

It is not an unprimeable number, because it can be changed into a prime (109809031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20916 + ... + 25633.

It is an arithmetic number, because the mean of its divisors is an integer number (15733900).

Almost surely, 2^109809091 is an apocalyptic number.

109809091 is a deficient number, since it is larger than the sum of its proper divisors (16062109).

109809091 is an equidigital number, since it uses as much as digits as its factorization.

109809091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46893.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 109809091 is about 10478.9832999199. The cubic root of 109809091 is about 478.8646357475.

The spelling of 109809091 in words is "one hundred nine million, eight hundred nine thousand, ninety-one".