23209109 has 16 divisors (see below), whose sum is σ = 29339520. Its totient is φ = 17832960.

The previous prime is 23209103. The next prime is 23209129. The reversal of 23209109 is 90190232.

It is a cyclic number.

It is not a de Polignac number, because 23209109 - 2²⁰ = 22160533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209103) 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, 3557 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (1833720).

Almost surely, 2^23209109 is an apocalyptic number.

It is an amenable number.

23209109 is a deficient number, since it is larger than the sum of its proper divisors (6130411).

23209109 is a wasteful number, since it uses less digits than its factorization.

23209109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 23209109 is about 4817.5833153148. The cubic root of 23209109 is about 285.2459516335.

The spelling of 23209109 in words is "twenty-three million, two hundred nine thousand, one hundred nine".