3938447 has 2 divisors, whose sum is σ = 3938448. Its totient is φ = 3938446.

The previous prime is 3938437. The next prime is 3938449. The reversal of 3938447 is 7448393.

3938447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3938447 - 2⁶ = 3938383 is a prime.

It is a super-2 number, since 2×3938447² = 31022729543618, which contains 22 as substring.

Together with 3938449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3938447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3938449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969223 + 1969224.

It is an arithmetic number, because the mean of its divisors is an integer number (1969224).

Almost surely, 2^3938447 is an apocalyptic number.

3938447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938447 is an equidigital number, since it uses as much as digits as its factorization.

3938447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 3938447 is about 1984.5520905232. The cubic root of 3938447 is about 157.9216483818.

The spelling of 3938447 in words is "three million, nine hundred thirty-eight thousand, four hundred forty-seven".