23649563 has 4 divisors (see below), whose sum is σ = 27028080. Its totient is φ = 20271048.

The previous prime is 23649557. The next prime is 23649581. The reversal of 23649563 is 36594632.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-23649563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23649503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689248 + ... + 1689261.

It is an arithmetic number, because the mean of its divisors is an integer number (6757020).

Almost surely, 2^23649563 is an apocalyptic number.

23649563 is a deficient number, since it is larger than the sum of its proper divisors (3378517).

23649563 is an equidigital number, since it uses as much as digits as its factorization.

23649563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378516.

The product of its digits is 116640, while the sum is 38.

The square root of 23649563 is about 4863.0816361645. The cubic root of 23649563 is about 287.0390870534.

The spelling of 23649563 in words is "twenty-three million, six hundred forty-nine thousand, five hundred sixty-three".