43072189 has 2 divisors, whose sum is σ = 43072190. Its totient is φ = 43072188.

The previous prime is 43072187. The next prime is 43072193. The reversal of 43072189 is 98127034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40068900 + 3003289 = 6330^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 43072189 - 2¹ = 43072187 is a prime.

Together with 43072187, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43072187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21536094 + 21536095.

It is an arithmetic number, because the mean of its divisors is an integer number (21536095).

Almost surely, 2^43072189 is an apocalyptic number.

It is an amenable number.

43072189 is a deficient number, since it is larger than the sum of its proper divisors (1).

43072189 is an equidigital number, since it uses as much as digits as its factorization.

43072189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 43072189 is about 6562.9405756871. The cubic root of 43072189 is about 350.5357482143.

The spelling of 43072189 in words is "forty-three million, seventy-two thousand, one hundred eighty-nine".