3685663 has 2 divisors, whose sum is σ = 3685664. Its totient is φ = 3685662.

The previous prime is 3685657. The next prime is 3685687. The reversal of 3685663 is 3665863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3685663 - 2⁵ = 3685631 is a prime.

It is a super-2 number, since 2×3685663² = 27168223499138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685463) 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, 1842831 + 1842832.

It is an arithmetic number, because the mean of its divisors is an integer number (1842832).

Almost surely, 2^3685663 is an apocalyptic number.

3685663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685663 is an equidigital number, since it uses as much as digits as its factorization.

3685663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 3685663 is about 1919.8080633230. The cubic root of 3685663 is about 154.4680062085.

It can be divided in two parts, 3685 and 663, that multiplied together give a triangular number (2443155 = T₂₂₁₀).

The spelling of 3685663 in words is "three million, six hundred eighty-five thousand, six hundred sixty-three".