8681013 has 20 divisors (see below), whose sum is σ = 14148288. Its totient is φ = 5260680.

The previous prime is 8681009. The next prime is 8681021. The reversal of 8681013 is 3101868.

It is not a de Polignac number, because 8681013 - 2² = 8681009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8681003) 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 19 ways as a sum of consecutive naturals, for example, 3981 + ... + 5762.

Almost surely, 2^8681013 is an apocalyptic number.

It is an amenable number.

8681013 is a deficient number, since it is larger than the sum of its proper divisors (5467275).

8681013 is a wasteful number, since it uses less digits than its factorization.

8681013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9766 (or 9757 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8681013 is about 2946.3558848177. The cubic root of 8681013 is about 205.5212828935.

Subtracting from 8681013 its product of nonzero digits (1152), we obtain a triangular number (8679861 = T₄₁₆₆).

It can be divided in two parts, 868 and 1013, that added together give a palindrome (1881).

The spelling of 8681013 in words is "eight million, six hundred eighty-one thousand, thirteen".