23987869 has 2 divisors, whose sum is σ = 23987870. Its totient is φ = 23987868.

The previous prime is 23987857. The next prime is 23987891. The reversal of 23987869 is 96878932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 5583769 = 4290^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 23987869 - 2⁵ = 23987837 is a prime.

It is a super-2 number, since 2×23987869² = 1150835718322322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23987839) 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, 11993934 + 11993935.

It is an arithmetic number, because the mean of its divisors is an integer number (11993935).

Almost surely, 2^23987869 is an apocalyptic number.

It is an amenable number.

23987869 is a deficient number, since it is larger than the sum of its proper divisors (1).

23987869 is an equidigital number, since it uses as much as digits as its factorization.

23987869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 23987869 is about 4897.7412140700. The cubic root of 23987869 is about 288.4013060665.

The spelling of 23987869 in words is "twenty-three million, nine hundred eighty-seven thousand, eight hundred sixty-nine".