109265209 has 3 divisors (see below), whose sum is σ = 109275663. Its totient is φ = 109254756.

The previous prime is 109265161. The next prime is 109265231. The reversal of 109265209 is 902562901.

The square root of 109265209 is 10453.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 2039184 = 10355^2 + 1428^2 .

It is not a de Polignac number, because 109265209 - 2¹⁵ = 109232441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109265509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5227 + ... + 15679.

It is an arithmetic number, because the mean of its divisors is an integer number (36425221).

Almost surely, 2^109265209 is an apocalyptic number.

109265209 is the 10453-rd square number.

109265209 is the 5227-th centered octagonal number.

It is an amenable number.

109265209 is a deficient number, since it is larger than the sum of its proper divisors (10454).

109265209 is an frugal number, since it uses more digits than its factorization.

109265209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20906 (or 10453 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The cubic root of 109265209 is about 478.0727248813.

The spelling of 109265209 in words is "one hundred nine million, two hundred sixty-five thousand, two hundred nine".