3687217 has 4 divisors (see below), whose sum is σ = 3691636. Its totient is φ = 3682800.

The previous prime is 3687209. The next prime is 3687227. The reversal of 3687217 is 7127863.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7127863 = 569 ⋅12527.

It can be written as a sum of positive squares in 2 ways, for example, as 414736 + 3272481 = 644^2 + 1809^2 .

It is a cyclic number.

It is not a de Polignac number, because 3687217 - 2³ = 3687209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3687227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534 + ... + 2767.

It is an arithmetic number, because the mean of its divisors is an integer number (922909).

Almost surely, 2^3687217 is an apocalyptic number.

It is an amenable number.

3687217 is a deficient number, since it is larger than the sum of its proper divisors (4419).

3687217 is a wasteful number, since it uses less digits than its factorization.

3687217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418.

The product of its digits is 14112, while the sum is 34.

The square root of 3687217 is about 1920.2127486297. The cubic root of 3687217 is about 154.4897128008.

The spelling of 3687217 in words is "three million, six hundred eighty-seven thousand, two hundred seventeen".