439430039 has 2 divisors, whose sum is σ = 439430040. Its totient is φ = 439430038.

The previous prime is 439430027. The next prime is 439430041. The reversal of 439430039 is 930034934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439430039 is a prime.

Together with 439430041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 439429990 and 439430008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439430539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219715019 + 219715020.

It is an arithmetic number, because the mean of its divisors is an integer number (219715020).

Almost surely, 2^439430039 is an apocalyptic number.

439430039 is a deficient number, since it is larger than the sum of its proper divisors (1).

439430039 is an equidigital number, since it uses as much as digits as its factorization.

439430039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 439430039 is about 20962.5866485985. The cubic root of 439430039 is about 760.2619359131.

The spelling of 439430039 in words is "four hundred thirty-nine million, four hundred thirty thousand, thirty-nine".