439949663 has 4 divisors (see below), whose sum is σ = 440323368. Its totient is φ = 439575960.

The previous prime is 439949623. The next prime is 439949677. The reversal of 439949663 is 366949934.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 439949663 - 2⁸ = 439949407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439949603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185081 + ... + 187442.

It is an arithmetic number, because the mean of its divisors is an integer number (110080842).

Almost surely, 2^439949663 is an apocalyptic number.

439949663 is a deficient number, since it is larger than the sum of its proper divisors (373705).

439949663 is a wasteful number, since it uses less digits than its factorization.

439949663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373704.

The product of its digits is 3779136, while the sum is 53.

The square root of 439949663 is about 20974.9770679255. The cubic root of 439949663 is about 760.5614866192.

The spelling of 439949663 in words is "four hundred thirty-nine million, nine hundred forty-nine thousand, six hundred sixty-three".