109189445 has 4 divisors (see below), whose sum is σ = 131027340. Its totient is φ = 87351552.

The previous prime is 109189439. The next prime is 109189477. The reversal of 109189445 is 544981901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17355556 + 91833889 = 4166^2 + 9583^2 .

It is a cyclic number.

It is not a de Polignac number, because 109189445 - 2²⁰ = 108140869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10918940 + ... + 10918949.

It is an arithmetic number, because the mean of its divisors is an integer number (32756835).

Almost surely, 2^109189445 is an apocalyptic number.

It is an amenable number.

109189445 is a deficient number, since it is larger than the sum of its proper divisors (21837895).

109189445 is an equidigital number, since it uses as much as digits as its factorization.

109189445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21837894.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 109189445 is about 10449.3753401818. The cubic root of 109189445 is about 477.9622015127.

The spelling of 109189445 in words is "one hundred nine million, one hundred eighty-nine thousand, four hundred forty-five".