8697681 has 6 divisors (see below), whose sum is σ = 12563330. Its totient is φ = 5798448.

The previous prime is 8697677. The next prime is 8697683. The reversal of 8697681 is 1867968.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 1648656 = 2655^2 + 1284^2 .

It is not a de Polignac number, because 8697681 - 2² = 8697677 is a prime.

It is a super-2 number, since 2×8697681² = 151299309555522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (8697683) 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 5 ways as a sum of consecutive naturals, for example, 483196 + ... + 483213.

Almost surely, 2^8697681 is an apocalyptic number.

It is an amenable number.

8697681 is a deficient number, since it is larger than the sum of its proper divisors (3865649).

8697681 is a wasteful number, since it uses less digits than its factorization.

8697681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966415 (or 966412 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 8697681 is about 2949.1831072350. The cubic root of 8697681 is about 205.6527360091.

The spelling of 8697681 in words is "eight million, six hundred ninety-seven thousand, six hundred eighty-one".