23987081 has 2 divisors, whose sum is σ = 23987082. Its totient is φ = 23987080.

The previous prime is 23987071. The next prime is 23987129. The reversal of 23987081 is 18078932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18627856 + 5359225 = 4316^2 + 2315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23987081 is a prime.

It is a super-2 number, since 2×23987081² = 1150760109801122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23987021) 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, 11993540 + 11993541.

It is an arithmetic number, because the mean of its divisors is an integer number (11993541).

Almost surely, 2^23987081 is an apocalyptic number.

It is an amenable number.

23987081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23987081 is an equidigital number, since it uses as much as digits as its factorization.

23987081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 23987081 is about 4897.6607681627. The cubic root of 23987081 is about 288.3981480436.

The spelling of 23987081 in words is "twenty-three million, nine hundred eighty-seven thousand, eighty-one".