8868521 has 2 divisors, whose sum is σ = 8868522. Its totient is φ = 8868520.

The previous prime is 8868479. The next prime is 8868523. The reversal of 8868521 is 1258688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7075600 + 1792921 = 2660^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 8868521 - 2²² = 4674217 is a prime.

It is a Sophie Germain prime.

Together with 8868523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8868523) 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, 4434260 + 4434261.

It is an arithmetic number, because the mean of its divisors is an integer number (4434261).

Almost surely, 2^8868521 is an apocalyptic number.

It is an amenable number.

8868521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8868521 is an equidigital number, since it uses as much as digits as its factorization.

8868521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 38.

The square root of 8868521 is about 2978.0062122165. The cubic root of 8868521 is about 206.9904933128.

The spelling of 8868521 in words is "eight million, eight hundred sixty-eight thousand, five hundred twenty-one".