3656217 has 4 divisors (see below), whose sum is σ = 4874960. Its totient is φ = 2437476.

The previous prime is 3656183. The next prime is 3656231. The reversal of 3656217 is 7126563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3656217 - 2⁷ = 3656089 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3656267) 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, 609367 + ... + 609372.

It is an arithmetic number, because the mean of its divisors is an integer number (1218740).

Almost surely, 2^3656217 is an apocalyptic number.

It is an amenable number.

3656217 is a deficient number, since it is larger than the sum of its proper divisors (1218743).

3656217 is a wasteful number, since it uses less digits than its factorization.

3656217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218742.

The product of its digits is 7560, while the sum is 30.

The square root of 3656217 is about 1912.1236884679. The cubic root of 3656217 is about 154.0555402076.

The spelling of 3656217 in words is "three million, six hundred fifty-six thousand, two hundred seventeen".