543721889 has 2 divisors, whose sum is σ = 543721890. Its totient is φ = 543721888.

The previous prime is 543721883. The next prime is 543721903. The reversal of 543721889 is 988127345.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400680289 + 143041600 = 20017^2 + 11960^2 .

It is a cyclic number.

It is not a de Polignac number, because 543721889 - 2¹² = 543717793 is a prime.

It is not a weakly prime, because it can be changed into another prime (543721883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271860944 + 271860945.

It is an arithmetic number, because the mean of its divisors is an integer number (271860945).

Almost surely, 2^543721889 is an apocalyptic number.

It is an amenable number.

543721889 is a deficient number, since it is larger than the sum of its proper divisors (1).

543721889 is an equidigital number, since it uses as much as digits as its factorization.

543721889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 543721889 is about 23317.8448618220. The cubic root of 543721889 is about 816.1918847609.

The spelling of 543721889 in words is "five hundred forty-three million, seven hundred twenty-one thousand, eight hundred eighty-nine".