109083891 has 16 divisors (see below), whose sum is σ = 166440704. Its totient is φ = 62252064.

The previous prime is 109083889. The next prime is 109083893. The reversal of 109083891 is 198380901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109083889) and next prime (109083893).

It is not a de Polignac number, because 109083891 - 2¹ = 109083889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109083893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15456 + ... + 21378.

It is an arithmetic number, because the mean of its divisors is an integer number (10402544).

Almost surely, 2^109083891 is an apocalyptic number.

109083891 is a deficient number, since it is larger than the sum of its proper divisors (57356813).

109083891 is an equidigital number, since it uses as much as digits as its factorization.

109083891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 109083891 is about 10444.3233864143. The cubic root of 109083891 is about 477.8081356809.

The spelling of 109083891 in words is "one hundred nine million, eighty-three thousand, eight hundred ninety-one".