8363681 has 2 divisors, whose sum is σ = 8363682. Its totient is φ = 8363680.

The previous prime is 8363671. The next prime is 8363689. The reversal of 8363681 is 1863638.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 46225 = 2884^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 8363681 - 2⁶ = 8363617 is a prime.

It is a super-2 number, since 2×8363681² = 139902319739522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8363689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4181840 + 4181841.

It is an arithmetic number, because the mean of its divisors is an integer number (4181841).

Almost surely, 2^8363681 is an apocalyptic number.

It is an amenable number.

8363681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8363681 is an equidigital number, since it uses as much as digits as its factorization.

8363681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 8363681 is about 2892.0029391410. The cubic root of 8363681 is about 202.9858758889.

The spelling of 8363681 in words is "eight million, three hundred sixty-three thousand, six hundred eighty-one".