23663749 has 2 divisors, whose sum is σ = 23663750. Its totient is φ = 23663748.

The previous prime is 23663743. The next prime is 23663821. The reversal of 23663749 is 94736632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 1404225 = 4718^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 23663749 - 2³ = 23663741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23663741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11831874 + 11831875.

It is an arithmetic number, because the mean of its divisors is an integer number (11831875).

Almost surely, 2^23663749 is an apocalyptic number.

It is an amenable number.

23663749 is a deficient number, since it is larger than the sum of its proper divisors (1).

23663749 is an equidigital number, since it uses as much as digits as its factorization.

23663749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 40.

The square root of 23663749 is about 4864.5399576938. The cubic root of 23663749 is about 287.0964682770.

The spelling of 23663749 in words is "twenty-three million, six hundred sixty-three thousand, seven hundred forty-nine".