3578681 has 2 divisors, whose sum is σ = 3578682. Its totient is φ = 3578680.

The previous prime is 3578657. The next prime is 3578683. The reversal of 3578681 is 1868753.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3031081 + 547600 = 1741^2 + 740^2 .

It is an emirp because it is prime and its reverse (1868753) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3578681 is a prime.

It is a super-2 number, since 2×3578681² = 25613915399522, which contains 22 as substring.

Together with 3578683, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3578683) 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 as a sum of consecutive naturals, namely, 1789340 + 1789341.

It is an arithmetic number, because the mean of its divisors is an integer number (1789341).

Almost surely, 2^3578681 is an apocalyptic number.

It is an amenable number.

3578681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3578681 is an equidigital number, since it uses as much as digits as its factorization.

3578681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 3578681 is about 1891.7402041507. The cubic root of 3578681 is about 152.9587511797.

The spelling of 3578681 in words is "three million, five hundred seventy-eight thousand, six hundred eighty-one".