23666749 has 2 divisors, whose sum is σ = 23666750. Its totient is φ = 23666748.

The previous prime is 23666711. The next prime is 23666759. The reversal of 23666749 is 94766632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 8008900 = 3957^2 + 2830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23666749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23666759) 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, 11833374 + 11833375.

It is an arithmetic number, because the mean of its divisors is an integer number (11833375).

Almost surely, 2^23666749 is an apocalyptic number.

It is an amenable number.

23666749 is a deficient number, since it is larger than the sum of its proper divisors (1).

23666749 is an equidigital number, since it uses as much as digits as its factorization.

23666749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 23666749 is about 4864.8483018487. The cubic root of 23666749 is about 287.1086000967.

The spelling of 23666749 in words is "twenty-three million, six hundred sixty-six thousand, seven hundred forty-nine".