3943613 has 2 divisors, whose sum is σ = 3943614. Its totient is φ = 3943612.

The previous prime is 3943591. The next prime is 3943627. The reversal of 3943613 is 3163493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2748964 + 1194649 = 1658^2 + 1093^2 .

It is an emirp because it is prime and its reverse (3163493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3943613 - 2²⁰ = 2895037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3943633) 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 as a sum of consecutive naturals, namely, 1971806 + 1971807.

It is an arithmetic number, because the mean of its divisors is an integer number (1971807).

Almost surely, 2^3943613 is an apocalyptic number.

It is an amenable number.

3943613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943613 is an equidigital number, since it uses as much as digits as its factorization.

3943613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 29.

The square root of 3943613 is about 1985.8532171336. The cubic root of 3943613 is about 157.9906660084.

The spelling of 3943613 in words is "three million, nine hundred forty-three thousand, six hundred thirteen".