6543973 has 2 divisors, whose sum is σ = 6543974. Its totient is φ = 6543972.

The previous prime is 6543947. The next prime is 6543989. The reversal of 6543973 is 3793456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4088484 + 2455489 = 2022^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543973 - 2⁹ = 6543461 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 5⁷ + 4 + 3⁷ + 9³ + 7³ + 3¹⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271986 + 3271987.

It is an arithmetic number, because the mean of its divisors is an integer number (3271987).

Almost surely, 2^6543973 is an apocalyptic number.

It is an amenable number.

6543973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543973 is an equidigital number, since it uses as much as digits as its factorization.

6543973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 37.

The square root of 6543973 is about 2558.1190355415. The cubic root of 6543973 is about 187.0454577926.

The spelling of 6543973 in words is "six million, five hundred forty-three thousand, nine hundred seventy-three".