3685687 has 2 divisors, whose sum is σ = 3685688. Its totient is φ = 3685686.

The previous prime is 3685663. The next prime is 3685691. The reversal of 3685687 is 7865863.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3685687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685657) 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, 1842843 + 1842844.

It is an arithmetic number, because the mean of its divisors is an integer number (1842844).

Almost surely, 2^3685687 is an apocalyptic number.

3685687 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685687 is an equidigital number, since it uses as much as digits as its factorization.

3685687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 3685687 is about 1919.8143139377. The cubic root of 3685687 is about 154.4683414918.

The spelling of 3685687 in words is "three million, six hundred eighty-five thousand, six hundred eighty-seven".