439004389 has 2 divisors, whose sum is σ = 439004390. Its totient is φ = 439004388.

The previous prime is 439004383. The next prime is 439004399. The reversal of 439004389 is 983400934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438693025 + 311364 = 20945^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 439004389 - 2¹¹ = 439002341 is a prime.

It is a super-2 number, since 2×439004389² = 385449707122526642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439004383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219502194 + 219502195.

It is an arithmetic number, because the mean of its divisors is an integer number (219502195).

Almost surely, 2^439004389 is an apocalyptic number.

It is an amenable number.

439004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

439004389 is an equidigital number, since it uses as much as digits as its factorization.

439004389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 439004389 is about 20952.4315772657. The cubic root of 439004389 is about 760.0163829571.

The spelling of 439004389 in words is "four hundred thirty-nine million, four thousand, three hundred eighty-nine".