439745375689 has 9 divisors (see below), whose sum is σ = 440830943469. Its totient is φ = 438662479500.

The previous prime is 439745375639. The next prime is 439745375737. The reversal of 439745375689 is 986573547934.

The square root of 439745375689 is 663133.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 439745375689 - 2²¹ = 439743278537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439745375639) 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 in 8 ways as a sum of consecutive naturals, for example, 498012442 + ... + 498013324.

It is an arithmetic number, because the mean of its divisors is an integer number (48981215941).

Almost surely, 2^439745375689 is an apocalyptic number.

439745375689 is the 663133-rd square number.

439745375689 is the 331567-th centered octagonal number.

It is an amenable number.

439745375689 is a deficient number, since it is larger than the sum of its proper divisors (1085567780).

439745375689 is an frugal number, since it uses more digits than its factorization.

439745375689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268 (or 1634 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 70.

The spelling of 439745375689 in words is "four hundred thirty-nine billion, seven hundred forty-five million, three hundred seventy-five thousand, six hundred eighty-nine".