3974681 has 2 divisors, whose sum is σ = 3974682. Its totient is φ = 3974680.

The previous prime is 3974657. The next prime is 3974683. The reversal of 3974681 is 1864793.

3974681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 1915456 = 1435^2 + 1384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3974681 is a prime.

It is a super-2 number, since 2×3974681² = 31596178103522, which contains 22 as substring.

Together with 3974683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3974683) 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 as a sum of consecutive naturals, namely, 1987340 + 1987341.

It is an arithmetic number, because the mean of its divisors is an integer number (1987341).

Almost surely, 2^3974681 is an apocalyptic number.

It is an amenable number.

3974681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974681 is an equidigital number, since it uses as much as digits as its factorization.

3974681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 3974681 is about 1993.6602017395. The cubic root of 3974681 is about 158.4044676366.

Subtracting from 3974681 its product of digits (36288), we obtain a palindrome (3938393).

The spelling of 3974681 in words is "three million, nine hundred seventy-four thousand, six hundred eighty-one".