3820217 has 4 divisors (see below), whose sum is σ = 3834000. Its totient is φ = 3806436.

The previous prime is 3820181. The next prime is 3820237. The reversal of 3820217 is 7120283.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7120283 = 29 ⋅245527.

It is a cyclic number.

It is not a de Polignac number, because 3820217 - 2⁶ = 3820153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3820192 and 3820201.

It is not an unprimeable number, because it can be changed into a prime (3820237) 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, 6467 + ... + 7032.

It is an arithmetic number, because the mean of its divisors is an integer number (958500).

Almost surely, 2^3820217 is an apocalyptic number.

It is an amenable number.

3820217 is a deficient number, since it is larger than the sum of its proper divisors (13783).

3820217 is a wasteful number, since it uses less digits than its factorization.

3820217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13782.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 3820217 is about 1954.5375412102. The cubic root of 3820217 is about 156.3253264534.

The spelling of 3820217 in words is "three million, eight hundred twenty thousand, two hundred seventeen".