6401790917 has 2 divisors, whose sum is σ = 6401790918. Its totient is φ = 6401790916.

The previous prime is 6401790911. The next prime is 6401790971. The reversal of 6401790917 is 7190971046.

6401790917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (6401790971) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4116377281 + 2285413636 = 64159^2 + 47806^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401790917 - 2³⁰ = 5328049093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401790911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200895458 + 3200895459.

It is an arithmetic number, because the mean of its divisors is an integer number (3200895459).

Almost surely, 2^6401790917 is an apocalyptic number.

It is an amenable number.

6401790917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401790917 is an equidigital number, since it uses as much as digits as its factorization.

6401790917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 6401790917 is about 80011.1924483069. The cubic root of 6401790917 is about 1856.8086985511.

The spelling of 6401790917 in words is "six billion, four hundred one million, seven hundred ninety thousand, nine hundred seventeen".