7868681 has 4 divisors (see below), whose sum is σ = 7986192. Its totient is φ = 7751172.

The previous prime is 7868677. The next prime is 7868687. The reversal of 7868681 is 1868687.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7868681 - 2² = 7868677 is a prime.

It is a super-2 number, since 2×7868681² = 123832281359522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7868687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58655 + ... + 58788.

It is an arithmetic number, because the mean of its divisors is an integer number (1996548).

Almost surely, 2^7868681 is an apocalyptic number.

It is an amenable number.

7868681 is a deficient number, since it is larger than the sum of its proper divisors (117511).

7868681 is a wasteful number, since it uses less digits than its factorization.

7868681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117510.

The product of its digits is 129024, while the sum is 44.

The square root of 7868681 is about 2805.1169316091. The cubic root of 7868681 is about 198.8996320547.

The spelling of 7868681 in words is "seven million, eight hundred sixty-eight thousand, six hundred eighty-one".