8701681 has 4 divisors (see below), whose sum is σ = 8709364. Its totient is φ = 8694000.

The previous prime is 8701657. The next prime is 8701703. The reversal of 8701681 is 1861078.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 4036081 = 2160^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 8701681 - 2¹¹ = 8699633 is a prime.

It is a super-2 number, since 2×8701681² = 151438504451522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8701621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (2177341).

Almost surely, 2^8701681 is an apocalyptic number.

It is an amenable number.

8701681 is a deficient number, since it is larger than the sum of its proper divisors (7683).

8701681 is a wasteful number, since it uses less digits than its factorization.

8701681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 8701681 is about 2949.8611831746. The cubic root of 8701681 is about 205.6842572415.

The spelling of 8701681 in words is "eight million, seven hundred one thousand, six hundred eighty-one".