2189879543 has 2 divisors, whose sum is σ = 2189879544. Its totient is φ = 2189879542.

The previous prime is 2189879539. The next prime is 2189879551. The reversal of 2189879543 is 3459789812.

2189879543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2189879543 - 2² = 2189879539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189879513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094939771 + 1094939772.

It is an arithmetic number, because the mean of its divisors is an integer number (1094939772).

Almost surely, 2^2189879543 is an apocalyptic number.

2189879543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189879543 is an equidigital number, since it uses as much as digits as its factorization.

2189879543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 2189879543 is about 46796.1488052169. The cubic root of 2189879543 is about 1298.5940506260.

The spelling of 2189879543 in words is "two billion, one hundred eighty-nine million, eight hundred seventy-nine thousand, five hundred forty-three".