439676369 has 6 divisors (see below), whose sum is σ = 483280770. Its totient is φ = 399705680.

The previous prime is 439676357. The next prime is 439676381. The reversal of 439676369 is 963676934.

It is an interprime number because it is at equal distance from previous prime (439676357) and next prime (439676381).

It can be written as a sum of positive squares in only one way, i.e., 239878144 + 199798225 = 15488^2 + 14135^2 .

It is not a de Polignac number, because 439676369 - 2⁸ = 439676113 is a prime.

It is a super-2 number, since 2×439676369² = 386630618914048322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 439676369.

It is not an unprimeable number, because it can be changed into a prime (439676339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1816724 + ... + 1816965.

It is an arithmetic number, because the mean of its divisors is an integer number (80546795).

Almost surely, 2^439676369 is an apocalyptic number.

It is an amenable number.

439676369 is a deficient number, since it is larger than the sum of its proper divisors (43604401).

439676369 is a wasteful number, since it uses less digits than its factorization.

439676369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633711 (or 3633700 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 53.

The square root of 439676369 is about 20968.4612930944. The cubic root of 439676369 is about 760.4039686400.

The spelling of 439676369 in words is "four hundred thirty-nine million, six hundred seventy-six thousand, three hundred sixty-nine".