3858794221 has 2 divisors, whose sum is σ = 3858794222. Its totient is φ = 3858794220.

The previous prime is 3858794213. The next prime is 3858794281. The reversal of 3858794221 is 1224978583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3752910121 + 105884100 = 61261^2 + 10290^2 .

It is a cyclic number.

It is not a de Polignac number, because 3858794221 - 2³ = 3858794213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3858794281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1929397110 + 1929397111.

It is an arithmetic number, because the mean of its divisors is an integer number (1929397111).

Almost surely, 2^3858794221 is an apocalyptic number.

It is an amenable number.

3858794221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3858794221 is an equidigital number, since it uses as much as digits as its factorization.

3858794221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 3858794221 is about 62119.1936602529. The cubic root of 3858794221 is about 1568.4976528730.

The spelling of 3858794221 in words is "three billion, eight hundred fifty-eight million, seven hundred ninety-four thousand, two hundred twenty-one".