6748901921 has 2 divisors, whose sum is σ = 6748901922. Its totient is φ = 6748901920.

The previous prime is 6748901917. The next prime is 6748901933. The reversal of 6748901921 is 1291098476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5994630625 + 754271296 = 77425^2 + 27464^2 .

It is a cyclic number.

It is not a de Polignac number, because 6748901921 - 2² = 6748901917 is a prime.

It is not a weakly prime, because it can be changed into another prime (6748901021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374450960 + 3374450961.

It is an arithmetic number, because the mean of its divisors is an integer number (3374450961).

Almost surely, 2^6748901921 is an apocalyptic number.

It is an amenable number.

6748901921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6748901921 is an equidigital number, since it uses as much as digits as its factorization.

6748901921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 6748901921 is about 82151.7006579900. The cubic root of 6748901921 is about 1889.7790883331.

The spelling of 6748901921 in words is "six billion, seven hundred forty-eight million, nine hundred one thousand, nine hundred twenty-one".