23648509 has 2 divisors, whose sum is σ = 23648510. Its totient is φ = 23648508.

The previous prime is 23648489. The next prime is 23648519. The reversal of 23648509 is 90584632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 10304100 = 3653^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 23648509 - 2⁹ = 23647997 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 (23648519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11824254 + 11824255.

It is an arithmetic number, because the mean of its divisors is an integer number (11824255).

Almost surely, 2^23648509 is an apocalyptic number.

It is an amenable number.

23648509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23648509 is an equidigital number, since it uses as much as digits as its factorization.

23648509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 23648509 is about 4862.9732674569. The cubic root of 23648509 is about 287.0348227929.

The spelling of 23648509 in words is "twenty-three million, six hundred forty-eight thousand, five hundred nine".