6740393321 has 2 divisors, whose sum is σ = 6740393322. Its totient is φ = 6740393320.

The previous prime is 6740393273. The next prime is 6740393347. The reversal of 6740393321 is 1233930476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6737947225 + 2446096 = 82085^2 + 1564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6740393321 is a prime.

It is not a weakly prime, because it can be changed into another prime (6740393381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3370196660 + 3370196661.

It is an arithmetic number, because the mean of its divisors is an integer number (3370196661).

Almost surely, 2^6740393321 is an apocalyptic number.

It is an amenable number.

6740393321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6740393321 is an equidigital number, since it uses as much as digits as its factorization.

6740393321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 6740393321 is about 82099.8984225925. The cubic root of 6740393321 is about 1888.9845819787.

The spelling of 6740393321 in words is "six billion, seven hundred forty million, three hundred ninety-three thousand, three hundred twenty-one".