8216863 has 2 divisors, whose sum is σ = 8216864. Its totient is φ = 8216862.

The previous prime is 8216843. The next prime is 8216893. The reversal of 8216863 is 3686128.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8216863 is a prime.

It is equal to p₅₅₃₃₉₉ and since 8216863 and 553399 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8216833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108431 + 4108432.

It is an arithmetic number, because the mean of its divisors is an integer number (4108432).

Almost surely, 2^8216863 is an apocalyptic number.

8216863 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216863 is an equidigital number, since it uses as much as digits as its factorization.

8216863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 8216863 is about 2866.5071079626. The cubic root of 8216863 is about 201.7911035245.

The spelling of 8216863 in words is "eight million, two hundred sixteen thousand, eight hundred sixty-three".