8771681 has 2 divisors, whose sum is σ = 8771682. Its totient is φ = 8771680.

The previous prime is 8771669. The next prime is 8771683. The reversal of 8771681 is 1861778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5382400 + 3389281 = 2320^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 8771681 - 2¹⁴ = 8755297 is a prime.

It is a super-2 number, since 2×8771681² = 153884775131522, which contains 22 as substring.

Together with 8771683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8771683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4385840 + 4385841.

It is an arithmetic number, because the mean of its divisors is an integer number (4385841).

Almost surely, 2^8771681 is an apocalyptic number.

It is an amenable number.

8771681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8771681 is an equidigital number, since it uses as much as digits as its factorization.

8771681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 38.

The square root of 8771681 is about 2961.7023820769. The cubic root of 8771681 is about 206.2343219181.

Subtracting from 8771681 its reverse (1861778), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8771681 in words is "eight million, seven hundred seventy-one thousand, six hundred eighty-one".