23965559 has 2 divisors, whose sum is σ = 23965560. Its totient is φ = 23965558.

The previous prime is 23965549. The next prime is 23965589. The reversal of 23965559 is 95556932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23965559 - 2¹² = 23961463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23965549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11982779 + 11982780.

It is an arithmetic number, because the mean of its divisors is an integer number (11982780).

Almost surely, 2^23965559 is an apocalyptic number.

23965559 is a deficient number, since it is larger than the sum of its proper divisors (1).

23965559 is an equidigital number, since it uses as much as digits as its factorization.

23965559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 364500, while the sum is 44.

The square root of 23965559 is about 4895.4631037319. The cubic root of 23965559 is about 288.3118687917.

The spelling of 23965559 in words is "twenty-three million, nine hundred sixty-five thousand, five hundred fifty-nine".