543212309 has 2 divisors, whose sum is σ = 543212310. Its totient is φ = 543212308.

The previous prime is 543212297. The next prime is 543212377. The reversal of 543212309 is 903212345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330694225 + 212518084 = 18185^2 + 14578^2 .

It is a cyclic number.

It is not a de Polignac number, because 543212309 - 2¹² = 543208213 is a prime.

It is a super-2 number, since 2×543212309² = 590159225298222962, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543272309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271606154 + 271606155.

It is an arithmetic number, because the mean of its divisors is an integer number (271606155).

Almost surely, 2^543212309 is an apocalyptic number.

It is an amenable number.

543212309 is a deficient number, since it is larger than the sum of its proper divisors (1).

543212309 is an equidigital number, since it uses as much as digits as its factorization.

543212309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 543212309 is about 23306.9154758840. The cubic root of 543212309 is about 815.9368247940.

The spelling of 543212309 in words is "five hundred forty-three million, two hundred twelve thousand, three hundred nine".