109571091 has 32 divisors (see below), whose sum is σ = 170127360. Its totient is φ = 61439904.

The previous prime is 109571089. The next prime is 109571101. The reversal of 109571091 is 190175901.

It is a happy number.

It is not a de Polignac number, because 109571091 - 2¹ = 109571089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109572091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387036 + ... + 387318.

It is an arithmetic number, because the mean of its divisors is an integer number (5316480).

Almost surely, 2^109571091 is an apocalyptic number.

109571091 is a deficient number, since it is larger than the sum of its proper divisors (60556269).

109571091 is a wasteful number, since it uses less digits than its factorization.

109571091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 2835, while the sum is 33.

The square root of 109571091 is about 10467.6210764433. The cubic root of 109571091 is about 478.5184220875.

The spelling of 109571091 in words is "one hundred nine million, five hundred seventy-one thousand, ninety-one".