6506789 has 2 divisors, whose sum is σ = 6506790. Its totient is φ = 6506788.

The previous prime is 6506779. The next prime is 6506813. The reversal of 6506789 is 9876056.

It is a happy number.

6506789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5678689 + 828100 = 2383^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 6506789 - 2²⁰ = 5458213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6506719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3253394 + 3253395.

It is an arithmetic number, because the mean of its divisors is an integer number (3253395).

Almost surely, 2^6506789 is an apocalyptic number.

It is an amenable number.

6506789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6506789 is an equidigital number, since it uses as much as digits as its factorization.

6506789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 6506789 is about 2550.8408417618. The cubic root of 6506789 is about 186.6905096386.

It can be divided in two parts, 65067 and 89, that added together give a palindrome (65156).

The spelling of 6506789 in words is "six million, five hundred six thousand, seven hundred eighty-nine".