3685309 has 2 divisors, whose sum is σ = 3685310. Its totient is φ = 3685308.

The previous prime is 3685303. The next prime is 3685327. The reversal of 3685309 is 9035863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 605284 = 1755^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685309 - 2³ = 3685301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842654 + 1842655.

It is an arithmetic number, because the mean of its divisors is an integer number (1842655).

Almost surely, 2^3685309 is an apocalyptic number.

It is an amenable number.

3685309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685309 is an equidigital number, since it uses as much as digits as its factorization.

3685309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 3685309 is about 1919.7158643924. The cubic root of 3685309 is about 154.4630606103.

The spelling of 3685309 in words is "three million, six hundred eighty-five thousand, three hundred nine".