3681217 has 2 divisors, whose sum is σ = 3681218. Its totient is φ = 3681216.

The previous prime is 3681199. The next prime is 3681239. The reversal of 3681217 is 7121863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 112896 = 1889^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681217 - 2¹⁹ = 3156929 is a prime.

It is not a weakly prime, because it can be changed into another prime (3681277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840608 + 1840609.

It is an arithmetic number, because the mean of its divisors is an integer number (1840609).

Almost surely, 2^3681217 is an apocalyptic number.

It is an amenable number.

3681217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681217 is an equidigital number, since it uses as much as digits as its factorization.

3681217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 3681217 is about 1918.6497856566. The cubic root of 3681217 is about 154.4058698449.

The spelling of 3681217 in words is "three million, six hundred eighty-one thousand, two hundred seventeen".