438989839 has 2 divisors, whose sum is σ = 438989840. Its totient is φ = 438989838.

The previous prime is 438989833. The next prime is 438989857. The reversal of 438989839 is 938989834.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438989839 - 2¹⁷ = 438858767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438989833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219494919 + 219494920.

It is an arithmetic number, because the mean of its divisors is an integer number (219494920).

Almost surely, 2^438989839 is an apocalyptic number.

438989839 is a deficient number, since it is larger than the sum of its proper divisors (1).

438989839 is an equidigital number, since it uses as much as digits as its factorization.

438989839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 61.

The square root of 438989839 is about 20952.0843593185. The cubic root of 438989839 is about 760.0079864119.

The spelling of 438989839 in words is "four hundred thirty-eight million, nine hundred eighty-nine thousand, eight hundred thirty-nine".