439575047909 has 2 divisors, whose sum is σ = 439575047910. Its totient is φ = 439575047908.

The previous prime is 439575047887. The next prime is 439575047911. The reversal of 439575047909 is 909740575934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423247830625 + 16327217284 = 650575^2 + 127778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439575047909 is a prime.

It is a Sophie Germain prime.

Together with 439575047911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439575047999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219787523954 + 219787523955.

It is an arithmetic number, because the mean of its divisors is an integer number (219787523955).

Almost surely, 2^439575047909 is an apocalyptic number.

It is an amenable number.

439575047909 is a deficient number, since it is larger than the sum of its proper divisors (1).

439575047909 is an equidigital number, since it uses as much as digits as its factorization.

439575047909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42865200, while the sum is 62.

The spelling of 439575047909 in words is "four hundred thirty-nine billion, five hundred seventy-five million, forty-seven thousand, nine hundred nine".