3608681 has 2 divisors, whose sum is σ = 3608682. Its totient is φ = 3608680.

The previous prime is 3608669. The next prime is 3608701. The reversal of 3608681 is 1868063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3031081 + 577600 = 1741^2 + 760^2 .

It is an emirp because it is prime and its reverse (1868063) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3608681 - 2¹⁸ = 3346537 is a prime.

It is a super-2 number, since 2×3608681² = 26045157119522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3608621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804340 + 1804341.

It is an arithmetic number, because the mean of its divisors is an integer number (1804341).

Almost surely, 2^3608681 is an apocalyptic number.

It is an amenable number.

3608681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3608681 is an equidigital number, since it uses as much as digits as its factorization.

3608681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 3608681 is about 1899.6528630252. The cubic root of 3608681 is about 153.3849789271.

The spelling of 3608681 in words is "three million, six hundred eight thousand, six hundred eighty-one".