3966217 has 4 divisors (see below), whose sum is σ = 4062996. Its totient is φ = 3869440.

The previous prime is 3966211. The next prime is 3966223. The reversal of 3966217 is 7126693.

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

It is an interprime number because it is at equal distance from previous prime (3966211) and next prime (3966223).

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 1597696 = 1539^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3966217 - 2⁷ = 3966089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3966211) 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, 48328 + ... + 48409.

It is an arithmetic number, because the mean of its divisors is an integer number (1015749).

Almost surely, 2^3966217 is an apocalyptic number.

It is an amenable number.

3966217 is a deficient number, since it is larger than the sum of its proper divisors (96779).

3966217 is an equidigital number, since it uses as much as digits as its factorization.

3966217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96778.

The product of its digits is 13608, while the sum is 34.

The square root of 3966217 is about 1991.5363416217. The cubic root of 3966217 is about 158.2919480633.

The spelling of 3966217 in words is "three million, nine hundred sixty-six thousand, two hundred seventeen".