6490280789 has 2 divisors, whose sum is σ = 6490280790. Its totient is φ = 6490280788.

The previous prime is 6490280777. The next prime is 6490280833. The reversal of 6490280789 is 9870820946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5598780625 + 891500164 = 74825^2 + 29858^2 .

It is a cyclic number.

It is not a de Polignac number, because 6490280789 - 2⁴ = 6490280773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6490280789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6490280729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245140394 + 3245140395.

It is an arithmetic number, because the mean of its divisors is an integer number (3245140395).

Almost surely, 2^6490280789 is an apocalyptic number.

It is an amenable number.

6490280789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6490280789 is an equidigital number, since it uses as much as digits as its factorization.

6490280789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 6490280789 is about 80562.2789461669. The cubic root of 6490280789 is about 1865.3249332860.

The spelling of 6490280789 in words is "six billion, four hundred ninety million, two hundred eighty thousand, seven hundred eighty-nine".