543021091 has 2 divisors, whose sum is σ = 543021092. Its totient is φ = 543021090.

The previous prime is 543021043. The next prime is 543021103. The reversal of 543021091 is 190120345.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543021091 is a prime.

It is not a weakly prime, because it can be changed into another prime (543024091) 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, 271510545 + 271510546.

It is an arithmetic number, because the mean of its divisors is an integer number (271510546).

Almost surely, 2^543021091 is an apocalyptic number.

543021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

543021091 is an equidigital number, since it uses as much as digits as its factorization.

543021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 543021091 is about 23302.8129417888. The cubic root of 543021091 is about 815.8410733318.

The spelling of 543021091 in words is "five hundred forty-three million, twenty-one thousand, ninety-one".