3943637 has 2 divisors, whose sum is σ = 3943638. Its totient is φ = 3943636.

The previous prime is 3943633. The next prime is 3943651. The reversal of 3943637 is 7363493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2709316 + 1234321 = 1646^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 3943637 - 2² = 3943633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3943597 and 3943606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3943631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971818 + 1971819.

It is an arithmetic number, because the mean of its divisors is an integer number (1971819).

Almost surely, 2^3943637 is an apocalyptic number.

It is an amenable number.

3943637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943637 is an equidigital number, since it uses as much as digits as its factorization.

3943637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 35.

The square root of 3943637 is about 1985.8592598671. The cubic root of 3943637 is about 157.9909865071.

The spelling of 3943637 in words is "three million, nine hundred forty-three thousand, six hundred thirty-seven".