7683681 has 4 divisors (see below), whose sum is σ = 10244912. Its totient is φ = 5122452.

The previous prime is 7683673. The next prime is 7683707. The reversal of 7683681 is 1863867.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1863867 = 3 ⋅621289.

It is not a de Polignac number, because 7683681 - 2³ = 7683673 is a prime.

It is a super-2 number, since 2×7683681² = 118077907419522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7683601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280611 + ... + 1280616.

It is an arithmetic number, because the mean of its divisors is an integer number (2561228).

Almost surely, 2^7683681 is an apocalyptic number.

It is an amenable number.

7683681 is a deficient number, since it is larger than the sum of its proper divisors (2561231).

7683681 is a wasteful number, since it uses less digits than its factorization.

7683681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561230.

The product of its digits is 48384, while the sum is 39.

The square root of 7683681 is about 2771.9453457816. The cubic root of 7683681 is about 197.3284821848.

The spelling of 7683681 in words is "seven million, six hundred eighty-three thousand, six hundred eighty-one".