6546509 has 2 divisors, whose sum is σ = 6546510. Its totient is φ = 6546508.

The previous prime is 6546473. The next prime is 6546539. The reversal of 6546509 is 9056456.

It is a happy number.

6546509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5189284 + 1357225 = 2278^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 6546509 - 2¹² = 6542413 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6546539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273254 + 3273255.

It is an arithmetic number, because the mean of its divisors is an integer number (3273255).

Almost surely, 2^6546509 is an apocalyptic number.

It is an amenable number.

6546509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6546509 is an equidigital number, since it uses as much as digits as its factorization.

6546509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 6546509 is about 2558.6146642275. The cubic root of 6546509 is about 187.0696167156.

The spelling of 6546509 in words is "six million, five hundred forty-six thousand, five hundred nine".