439509073 has 2 divisors, whose sum is σ = 439509074. Its totient is φ = 439509072.

The previous prime is 439509071. The next prime is 439509089. The reversal of 439509073 is 370905934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423412929 + 16096144 = 20577^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 439509073 - 2¹ = 439509071 is a prime.

Together with 439509071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (439509071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219754536 + 219754537.

It is an arithmetic number, because the mean of its divisors is an integer number (219754537).

Almost surely, 2^439509073 is an apocalyptic number.

It is an amenable number.

439509073 is a deficient number, since it is larger than the sum of its proper divisors (1).

439509073 is an equidigital number, since it uses as much as digits as its factorization.

439509073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 439509073 is about 20964.4716842567. The cubic root of 439509073 is about 760.3075123300.

The spelling of 439509073 in words is "four hundred thirty-nine million, five hundred nine thousand, seventy-three".