23887217 has 2 divisors, whose sum is σ = 23887218. Its totient is φ = 23887216.

The previous prime is 23887187. The next prime is 23887243. The reversal of 23887217 is 71278832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15178816 + 8708401 = 3896^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 23887217 - 2¹⁰ = 23886193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23887117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11943608 + 11943609.

It is an arithmetic number, because the mean of its divisors is an integer number (11943609).

Almost surely, 2^23887217 is an apocalyptic number.

It is an amenable number.

23887217 is a deficient number, since it is larger than the sum of its proper divisors (1).

23887217 is an equidigital number, since it uses as much as digits as its factorization.

23887217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 23887217 is about 4887.4550637320. The cubic root of 23887217 is about 287.9973676778.

The spelling of 23887217 in words is "twenty-three million, eight hundred eighty-seven thousand, two hundred seventeen".