43089089 has 2 divisors, whose sum is σ = 43089090. Its totient is φ = 43089088.

The previous prime is 43089061. The next prime is 43089091. The reversal of 43089089 is 98098034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36240400 + 6848689 = 6020^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 43089089 - 2⁸ = 43088833 is a prime.

Together with 43089091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43089889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21544544 + 21544545.

It is an arithmetic number, because the mean of its divisors is an integer number (21544545).

Almost surely, 2^43089089 is an apocalyptic number.

It is an amenable number.

43089089 is a deficient number, since it is larger than the sum of its proper divisors (1).

43089089 is an equidigital number, since it uses as much as digits as its factorization.

43089089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 43089089 is about 6564.2279820250. The cubic root of 43089089 is about 350.5815881531.

The spelling of 43089089 in words is "forty-three million, eighty-nine thousand, eighty-nine".