109072945 has 4 divisors (see below), whose sum is σ = 130887540. Its totient is φ = 87258352.

The previous prime is 109072933. The next prime is 109072949. The reversal of 109072945 is 549270901.

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 21986721 + 87086224 = 4689^2 + 9332^2 .

It is a cyclic number.

It is not a de Polignac number, because 109072945 - 2¹⁷ = 108941873 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (109072949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10907290 + ... + 10907299.

It is an arithmetic number, because the mean of its divisors is an integer number (32721885).

Almost surely, 2^109072945 is an apocalyptic number.

It is an amenable number.

109072945 is a deficient number, since it is larger than the sum of its proper divisors (21814595).

109072945 is an equidigital number, since it uses as much as digits as its factorization.

109072945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21814594.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 109072945 is about 10443.7993565560. The cubic root of 109072945 is about 477.7921532942.

The spelling of 109072945 in words is "one hundred nine million, seventy-two thousand, nine hundred forty-five".