3908681 has 6 divisors (see below), whose sum is σ = 4546890. Its totient is φ = 3350256.

The previous prime is 3908659. The next prime is 3908687. The reversal of 3908681 is 1868093.

3908681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 67081 = 1960^2 + 259^2 .

It is not a de Polignac number, because 3908681 - 2⁶ = 3908617 is a prime.

It is a super-2 number, since 2×3908681² = 30555574319522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3908687) 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 in 5 ways as a sum of consecutive naturals, for example, 39836 + ... + 39933.

It is an arithmetic number, because the mean of its divisors is an integer number (757815).

Almost surely, 2^3908681 is an apocalyptic number.

It is an amenable number.

3908681 is a deficient number, since it is larger than the sum of its proper divisors (638209).

3908681 is an equidigital number, since it uses as much as digits as its factorization.

3908681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79783 (or 79776 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 3908681 is about 1977.0384417102. The cubic root of 3908681 is about 157.5227950546.

The spelling of 3908681 in words is "three million, nine hundred eight thousand, six hundred eighty-one".