3994217 has 4 divisors (see below), whose sum is σ = 4004676. Its totient is φ = 3983760.

The previous prime is 3994213. The next prime is 3994223. The reversal of 3994217 is 7124993.

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 2483776 + 1510441 = 1576^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994217 - 2² = 3994213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3994213) 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, 4634 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (1001169).

Almost surely, 2^3994217 is an apocalyptic number.

It is an amenable number.

3994217 is a deficient number, since it is larger than the sum of its proper divisors (10459).

3994217 is a wasteful number, since it uses less digits than its factorization.

3994217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458.

The product of its digits is 13608, while the sum is 35.

The square root of 3994217 is about 1998.5537270737. The cubic root of 3994217 is about 158.6635687984.

The spelling of 3994217 in words is "three million, nine hundred ninety-four thousand, two hundred seventeen".