243089089 has 2 divisors, whose sum is σ = 243089090. Its totient is φ = 243089088.

The previous prime is 243089039. The next prime is 243089117. The reversal of 243089089 is 980980342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165508225 + 77580864 = 12865^2 + 8808^2 .

It is a cyclic number.

It is not a de Polignac number, because 243089089 - 2¹³ = 243080897 is a prime.

It is not a weakly prime, because it can be changed into another prime (243089009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121544544 + 121544545.

It is an arithmetic number, because the mean of its divisors is an integer number (121544545).

Almost surely, 2^243089089 is an apocalyptic number.

It is an amenable number.

243089089 is a deficient number, since it is larger than the sum of its proper divisors (1).

243089089 is an equidigital number, since it uses as much as digits as its factorization.

243089089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 243089089 is about 15591.3145372672. The cubic root of 243089089 is about 624.1013979221.

It can be divided in two parts, 2430 and 89089, that added together give a palindrome (91519).

The spelling of 243089089 in words is "two hundred forty-three million, eighty-nine thousand, eighty-nine".