3930257321 has 2 divisors, whose sum is σ = 3930257322. Its totient is φ = 3930257320.

The previous prime is 3930257311. The next prime is 3930257323. The reversal of 3930257321 is 1237520393.

3930257321 is digitally balanced in base 3, 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., 3774382096 + 155875225 = 61436^2 + 12485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3930257321 - 2⁶ = 3930257257 is a prime.

Together with 3930257323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3930257323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965128660 + 1965128661.

It is an arithmetic number, because the mean of its divisors is an integer number (1965128661).

Almost surely, 2^3930257321 is an apocalyptic number.

It is an amenable number.

3930257321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3930257321 is an equidigital number, since it uses as much as digits as its factorization.

3930257321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 3930257321 is about 62691.7643793824. The cubic root of 3930257321 is about 1578.1211069674.

The spelling of 3930257321 in words is "three billion, nine hundred thirty million, two hundred fifty-seven thousand, three hundred twenty-one".