543421369 has 2 divisors, whose sum is σ = 543421370. Its totient is φ = 543421368.

The previous prime is 543421321. The next prime is 543421387. The reversal of 543421369 is 963124345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514745344 + 28676025 = 22688^2 + 5355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543421369 is a prime.

It is a super-2 number, since 2×543421369² = 590613568571668322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (543421469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271710684 + 271710685.

It is an arithmetic number, because the mean of its divisors is an integer number (271710685).

Almost surely, 2^543421369 is an apocalyptic number.

It is an amenable number.

543421369 is a deficient number, since it is larger than the sum of its proper divisors (1).

543421369 is an equidigital number, since it uses as much as digits as its factorization.

543421369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 543421369 is about 23311.3999794092. The cubic root of 543421369 is about 816.0414848390.

The spelling of 543421369 in words is "five hundred forty-three million, four hundred twenty-one thousand, three hundred sixty-nine".