3688709 has 2 divisors, whose sum is σ = 3688710. Its totient is φ = 3688708.

The previous prime is 3688703. The next prime is 3688757. The reversal of 3688709 is 9078863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 1276900 = 1553^2 + 1130^2 .

It is an emirp because it is prime and its reverse (9078863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3688709 - 2⁴ = 3688693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3688703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1844354 + 1844355.

It is an arithmetic number, because the mean of its divisors is an integer number (1844355).

Almost surely, 2^3688709 is an apocalyptic number.

It is an amenable number.

3688709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3688709 is an equidigital number, since it uses as much as digits as its factorization.

3688709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 3688709 is about 1920.6012079555. The cubic root of 3688709 is about 154.5105476263.

The spelling of 3688709 in words is "three million, six hundred eighty-eight thousand, seven hundred nine".