3685817 has 4 divisors (see below), whose sum is σ = 3691380. Its totient is φ = 3680256.

The previous prime is 3685811. The next prime is 3685837. The reversal of 3685817 is 7185863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2383936 + 1301881 = 1544^2 + 1141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3685817 is a prime.

It is a super-3 number, since 3×3685817³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3685811) 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 in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 3165.

It is an arithmetic number, because the mean of its divisors is an integer number (922845).

Almost surely, 2^3685817 is an apocalyptic number.

It is an amenable number.

3685817 is a deficient number, since it is larger than the sum of its proper divisors (5563).

3685817 is an equidigital number, since it uses as much as digits as its factorization.

3685817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562.

The product of its digits is 40320, while the sum is 38.

The square root of 3685817 is about 1919.8481710802. The cubic root of 3685817 is about 154.4701575845.

The spelling of 3685817 in words is "three million, six hundred eighty-five thousand, eight hundred seventeen".