6326993921 has 4 divisors (see below), whose sum is σ = 6699170052. Its totient is φ = 5954817792.

The previous prime is 6326993909. The next prime is 6326993923. The reversal of 6326993921 is 1293996236.

6326993921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5502672400 + 824321521 = 74180^2 + 28711^2 .

It is a cyclic number.

It is not a de Polignac number, because 6326993921 - 2¹⁰ = 6326992897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6326993921.

It is not an unprimeable number, because it can be changed into a prime (6326993923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186088040 + ... + 186088073.

It is an arithmetic number, because the mean of its divisors is an integer number (1674792513).

Almost surely, 2^6326993921 is an apocalyptic number.

It is an amenable number.

6326993921 is a deficient number, since it is larger than the sum of its proper divisors (372176131).

6326993921 is a wasteful number, since it uses less digits than its factorization.

6326993921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372176130.

The product of its digits is 944784, while the sum is 50.

The square root of 6326993921 is about 79542.4032890634. The cubic root of 6326993921 is about 1849.5488474753.

The spelling of 6326993921 in words is "six billion, three hundred twenty-six million, nine hundred ninety-three thousand, nine hundred twenty-one".