43121189 has 2 divisors, whose sum is σ = 43121190. Its totient is φ = 43121188.

The previous prime is 43121101. The next prime is 43121207. The reversal of 43121189 is 98112134.

43121189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36204289 + 6916900 = 6017^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43121189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43121789) 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, 21560594 + 21560595.

It is an arithmetic number, because the mean of its divisors is an integer number (21560595).

Almost surely, 2^43121189 is an apocalyptic number.

It is an amenable number.

43121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

43121189 is an equidigital number, since it uses as much as digits as its factorization.

43121189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 43121189 is about 6566.6725972900. The cubic root of 43121189 is about 350.6686239190.

The spelling of 43121189 in words is "forty-three million, one hundred twenty-one thousand, one hundred eighty-nine".