23644513 has 2 divisors, whose sum is σ = 23644514. Its totient is φ = 23644512.

The previous prime is 23644487. The next prime is 23644549. The reversal of 23644513 is 31544632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13198689 + 10445824 = 3633^2 + 3232^2 .

It is a cyclic number.

It is not a de Polignac number, because 23644513 - 2¹³ = 23636321 is a prime.

It is not a weakly prime, because it can be changed into another prime (23644553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11822256 + 11822257.

It is an arithmetic number, because the mean of its divisors is an integer number (11822257).

Almost surely, 2^23644513 is an apocalyptic number.

It is an amenable number.

23644513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23644513 is an equidigital number, since it uses as much as digits as its factorization.

23644513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 23644513 is about 4862.5623903452. The cubic root of 23644513 is about 287.0186546734.

The spelling of 23644513 in words is "twenty-three million, six hundred forty-four thousand, five hundred thirteen".