23886721 has 2 divisors, whose sum is σ = 23886722. Its totient is φ = 23886720.

The previous prime is 23886713. The next prime is 23886727. The reversal of 23886721 is 12768832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 10491121 = 3660^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 23886721 - 2³ = 23886713 is a prime.

It is not a weakly prime, because it can be changed into another prime (23886727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11943360 + 11943361.

It is an arithmetic number, because the mean of its divisors is an integer number (11943361).

Almost surely, 2^23886721 is an apocalyptic number.

It is an amenable number.

23886721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23886721 is an equidigital number, since it uses as much as digits as its factorization.

23886721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 23886721 is about 4887.4043213141. The cubic root of 23886721 is about 287.9953743149.

The spelling of 23886721 in words is "twenty-three million, eight hundred eighty-six thousand, seven hundred twenty-one".