438365489 has 2 divisors, whose sum is σ = 438365490. Its totient is φ = 438365488.

The previous prime is 438365429. The next prime is 438365497. The reversal of 438365489 is 984563834.

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., 437144464 + 1221025 = 20908^2 + 1105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438365489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438365429) 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, 219182744 + 219182745.

It is an arithmetic number, because the mean of its divisors is an integer number (219182745).

Almost surely, 2^438365489 is an apocalyptic number.

It is an amenable number.

438365489 is a deficient number, since it is larger than the sum of its proper divisors (1).

438365489 is an equidigital number, since it uses as much as digits as its factorization.

438365489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 50.

The square root of 438365489 is about 20937.1795856080. The cubic root of 438365489 is about 759.6475102470.

The spelling of 438365489 in words is "four hundred thirty-eight million, three hundred sixty-five thousand, four hundred eighty-nine".