8681669 has 2 divisors, whose sum is σ = 8681670. Its totient is φ = 8681668.

The previous prime is 8681663. The next prime is 8681693. The reversal of 8681669 is 9661868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 925444 = 2785^2 + 962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8681669 is a prime.

It is a super-2 number, since 2×8681669² = 150742753251122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8681663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4340834 + 4340835.

It is an arithmetic number, because the mean of its divisors is an integer number (4340835).

Almost surely, 2^8681669 is an apocalyptic number.

It is an amenable number.

8681669 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681669 is an equidigital number, since it uses as much as digits as its factorization.

8681669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 8681669 is about 2946.4672066731. The cubic root of 8681669 is about 205.5264596536.

The spelling of 8681669 in words is "eight million, six hundred eighty-one thousand, six hundred sixty-nine".