8785681 has 2 divisors, whose sum is σ = 8785682. Its totient is φ = 8785680.

The previous prime is 8785661. The next prime is 8785691. The reversal of 8785681 is 1865878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5022081 + 3763600 = 2241^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 8785681 - 2⁵ = 8785649 is a prime.

It is a super-2 number, since 2×8785681² = 154376381267522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8785661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4392840 + 4392841.

It is an arithmetic number, because the mean of its divisors is an integer number (4392841).

Almost surely, 2^8785681 is an apocalyptic number.

It is an amenable number.

8785681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8785681 is an equidigital number, since it uses as much as digits as its factorization.

8785681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 43.

The square root of 8785681 is about 2964.0649453074. The cubic root of 8785681 is about 206.3439833688.

The spelling of 8785681 in words is "eight million, seven hundred eighty-five thousand, six hundred eighty-one".