3938944213 has 2 divisors, whose sum is σ = 3938944214. Its totient is φ = 3938944212.

The previous prime is 3938944211. The next prime is 3938944223. The reversal of 3938944213 is 3124498393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3511984644 + 426959569 = 59262^2 + 20663^2 .

It is a cyclic number.

It is not a de Polignac number, because 3938944213 - 2¹ = 3938944211 is a prime.

Together with 3938944211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3938944211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969472106 + 1969472107.

It is an arithmetic number, because the mean of its divisors is an integer number (1969472107).

Almost surely, 2^3938944213 is an apocalyptic number.

It is an amenable number.

3938944213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938944213 is an equidigital number, since it uses as much as digits as its factorization.

3938944213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 3938944213 is about 62761.0086996696. The cubic root of 3938944213 is about 1579.2829375851.

The spelling of 3938944213 in words is "three billion, nine hundred thirty-eight million, nine hundred forty-four thousand, two hundred thirteen".