6549973 has 2 divisors, whose sum is σ = 6549974. Its totient is φ = 6549972.

The previous prime is 6549937. The next prime is 6549979. The reversal of 6549973 is 3799456.

Together with previous prime (6549937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6461764 + 88209 = 2542^2 + 297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6549973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6549979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3274986 + 3274987.

It is an arithmetic number, because the mean of its divisors is an integer number (3274987).

Almost surely, 2^6549973 is an apocalyptic number.

It is an amenable number.

6549973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6549973 is an equidigital number, since it uses as much as digits as its factorization.

6549973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 6549973 is about 2559.2915035220. The cubic root of 6549973 is about 187.1026060483.

The spelling of 6549973 in words is "six million, five hundred forty-nine thousand, nine hundred seventy-three".