23105609 has 2 divisors, whose sum is σ = 23105610. Its totient is φ = 23105608.

The previous prime is 23105603. The next prime is 23105627. The reversal of 23105609 is 90650132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18088009 + 5017600 = 4253^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 23105609 - 2²⁰ = 22057033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23105603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11552804 + 11552805.

It is an arithmetic number, because the mean of its divisors is an integer number (11552805).

Almost surely, 2^23105609 is an apocalyptic number.

It is an amenable number.

23105609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23105609 is an equidigital number, since it uses as much as digits as its factorization.

23105609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 23105609 is about 4806.8294124090. The cubic root of 23105609 is about 284.8213058549.

The spelling of 23105609 in words is "twenty-three million, one hundred five thousand, six hundred nine".