23543609 has 2 divisors, whose sum is σ = 23543610. Its totient is φ = 23543608.

The previous prime is 23543593. The next prime is 23543617. The reversal of 23543609 is 90634532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 2795584 = 4555^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 23543609 - 2⁴ = 23543593 is a prime.

It is not a weakly prime, because it can be changed into another prime (23543669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11771804 + 11771805.

It is an arithmetic number, because the mean of its divisors is an integer number (11771805).

Almost surely, 2^23543609 is an apocalyptic number.

It is an amenable number.

23543609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23543609 is an equidigital number, since it uses as much as digits as its factorization.

23543609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 23543609 is about 4852.1756975608. The cubic root of 23543609 is about 286.6097842489.

The spelling of 23543609 in words is "twenty-three million, five hundred forty-three thousand, six hundred nine".