239888489 has 2 divisors, whose sum is σ = 239888490. Its totient is φ = 239888488.

The previous prime is 239888401. The next prime is 239888503. The reversal of 239888489 is 984888932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227406400 + 12482089 = 15080^2 + 3533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239888489 is a prime.

It is not a weakly prime, because it can be changed into another prime (239881489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119944244 + 119944245.

It is an arithmetic number, because the mean of its divisors is an integer number (119944245).

Almost surely, 2^239888489 is an apocalyptic number.

It is an amenable number.

239888489 is a deficient number, since it is larger than the sum of its proper divisors (1).

239888489 is an equidigital number, since it uses as much as digits as its factorization.

239888489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7962624, while the sum is 59.

The square root of 239888489 is about 15488.3339646329. Note that the first 3 decimals coincide. The cubic root of 239888489 is about 621.3502388905.

The spelling of 239888489 in words is "two hundred thirty-nine million, eight hundred eighty-eight thousand, four hundred eighty-nine".