7986681 has 24 divisors (see below), whose sum is σ = 12492480. Its totient is φ = 5089392.

The previous prime is 7986679. The next prime is 7986683. The reversal of 7986681 is 1866897.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7986679) and next prime (7986683).

It is not a de Polignac number, because 7986681 - 2¹ = 7986679 is a prime.

It is a super-2 number, since 2×7986681² = 127574146791522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7986683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4875 + ... + 6303.

It is an arithmetic number, because the mean of its divisors is an integer number (520520).

Almost surely, 2^7986681 is an apocalyptic number.

It is an amenable number.

7986681 is a deficient number, since it is larger than the sum of its proper divisors (4505799).

7986681 is a wasteful number, since it uses less digits than its factorization.

7986681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1455 counting only the distinct ones).

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

The square root of 7986681 is about 2826.0716551425. The cubic root of 7986681 is about 199.8889466805. Note that the first 3 decimals are identical.

The spelling of 7986681 in words is "seven million, nine hundred eighty-six thousand, six hundred eighty-one".