6543187349 has 2 divisors, whose sum is σ = 6543187350. Its totient is φ = 6543187348.

The previous prime is 6543187331. The next prime is 6543187393. The reversal of 6543187349 is 9437813456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4995945124 + 1547242225 = 70682^2 + 39335^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543187349 - 2⁸ = 6543187093 is a prime.

It is a super-2 number, since 2×6543187349² = 85626601368227295602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6543187297 and 6543187306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543187309) 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, 3271593674 + 3271593675.

It is an arithmetic number, because the mean of its divisors is an integer number (3271593675).

Almost surely, 2^6543187349 is an apocalyptic number.

It is an amenable number.

6543187349 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543187349 is an equidigital number, since it uses as much as digits as its factorization.

6543187349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The square root of 6543187349 is about 80889.9706329530. The cubic root of 6543187349 is about 1870.3797210911.

The spelling of 6543187349 in words is "six billion, five hundred forty-three million, one hundred eighty-seven thousand, three hundred forty-nine".