43724189 has 2 divisors, whose sum is σ = 43724190. Its totient is φ = 43724188.

The previous prime is 43724123. The next prime is 43724201. The reversal of 43724189 is 98142734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34421689 + 9302500 = 5867^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 43724189 - 2¹⁶ = 43658653 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 (43724689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21862094 + 21862095.

It is an arithmetic number, because the mean of its divisors is an integer number (21862095).

Almost surely, 2^43724189 is an apocalyptic number.

It is an amenable number.

43724189 is a deficient number, since it is larger than the sum of its proper divisors (1).

43724189 is an equidigital number, since it uses as much as digits as its factorization.

43724189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 43724189 is about 6612.4268615993. The cubic root of 43724189 is about 352.2956285612.

The spelling of 43724189 in words is "forty-three million, seven hundred twenty-four thousand, one hundred eighty-nine".