3845666393 has 2 divisors, whose sum is σ = 3845666394. Its totient is φ = 3845666392.

The previous prime is 3845666351. The next prime is 3845666399. The reversal of 3845666393 is 3936665483.

3845666393 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 can be written as a sum of positive squares in only one way, i.e., 3808370944 + 37295449 = 61712^2 + 6107^2 .

It is an emirp because it is prime and its reverse (3936665483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3845666393 - 2⁸ = 3845666137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3845666399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922833196 + 1922833197.

It is an arithmetic number, because the mean of its divisors is an integer number (1922833197).

Almost surely, 2^3845666393 is an apocalyptic number.

It is an amenable number.

3845666393 is a deficient number, since it is larger than the sum of its proper divisors (1).

3845666393 is an equidigital number, since it uses as much as digits as its factorization.

3845666393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 53.

The square root of 3845666393 is about 62013.4371971108. The cubic root of 3845666393 is about 1566.7169271688.

The spelling of 3845666393 in words is "three billion, eight hundred forty-five million, six hundred sixty-six thousand, three hundred ninety-three".