23963649 has 4 divisors (see below), whose sum is σ = 31951536. Its totient is φ = 15975764.

The previous prime is 23963633. The next prime is 23963669. The reversal of 23963649 is 94636932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23963649 - 2⁴ = 23963633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23963649.

It is not an unprimeable number, because it can be changed into a prime (23963669) 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, 3993939 + ... + 3993944.

It is an arithmetic number, because the mean of its divisors is an integer number (7987884).

Almost surely, 2^23963649 is an apocalyptic number.

It is an amenable number.

23963649 is a deficient number, since it is larger than the sum of its proper divisors (7987887).

23963649 is an equidigital number, since it uses as much as digits as its factorization.

23963649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7987886.

The product of its digits is 209952, while the sum is 42.

The square root of 23963649 is about 4895.2680212630. The cubic root of 23963649 is about 288.3042093237.

The spelling of 23963649 in words is "twenty-three million, nine hundred sixty-three thousand, six hundred forty-nine".