7689681 has 8 divisors (see below), whose sum is σ = 11392160. Its totient is φ = 5126436.

The previous prime is 7689667. The next prime is 7689707. The reversal of 7689681 is 1869867.

It is a happy number.

It is not a de Polignac number, because 7689681 - 2¹³ = 7681489 is a prime.

It is a super-2 number, since 2×7689681² = 118262387763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7689631) 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 7 ways as a sum of consecutive naturals, for example, 142375 + ... + 142428.

It is an arithmetic number, because the mean of its divisors is an integer number (1424020).

Almost surely, 2^7689681 is an apocalyptic number.

It is an amenable number.

7689681 is a deficient number, since it is larger than the sum of its proper divisors (3702479).

7689681 is a wasteful number, since it uses less digits than its factorization.

7689681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284812 (or 284806 counting only the distinct ones).

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

The square root of 7689681 is about 2773.0274070048. The cubic root of 7689681 is about 197.3798318287.

The spelling of 7689681 in words is "seven million, six hundred eighty-nine thousand, six hundred eighty-one".