43243589 has 2 divisors, whose sum is σ = 43243590. Its totient is φ = 43243588.

The previous prime is 43243583. The next prime is 43243621. The reversal of 43243589 is 98534234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 2666689 = 6370^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243589 - 2¹⁶ = 43178053 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 (43243583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621794 + 21621795.

It is an arithmetic number, because the mean of its divisors is an integer number (21621795).

Almost surely, 2^43243589 is an apocalyptic number.

It is an amenable number.

43243589 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243589 is an equidigital number, since it uses as much as digits as its factorization.

43243589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 43243589 is about 6575.9857816148. The cubic root of 43243589 is about 351.0001028130. Note that the first 3 decimals are identical.

Subtracting from 43243589 its sum of digits (38), we obtain a cube (43243551 = 351³).

The spelling of 43243589 in words is "forty-three million, two hundred forty-three thousand, five hundred eighty-nine".