3681709 has 2 divisors, whose sum is σ = 3681710. Its totient is φ = 3681708.

The previous prime is 3681697. The next prime is 3681719. The reversal of 3681709 is 9071863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3222025 + 459684 = 1795^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681709 - 2¹¹ = 3679661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3681719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840854 + 1840855.

It is an arithmetic number, because the mean of its divisors is an integer number (1840855).

Almost surely, 2^3681709 is an apocalyptic number.

It is an amenable number.

3681709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681709 is an equidigital number, since it uses as much as digits as its factorization.

3681709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 3681709 is about 1918.7779965384. Note that the first 3 decimals coincide. The cubic root of 3681709 is about 154.4127483948.

The spelling of 3681709 in words is "three million, six hundred eighty-one thousand, seven hundred nine".