439656971 has 4 divisors (see below), whose sum is σ = 473476752. Its totient is φ = 405837192.

The previous prime is 439656961. The next prime is 439657003. The reversal of 439656971 is 179656934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179656934 = 2 ⋅89828467.

It is a cyclic number.

It is not a de Polignac number, because 439656971 - 2¹⁰ = 439655947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439656961) 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, 16909871 + ... + 16909896.

It is an arithmetic number, because the mean of its divisors is an integer number (118369188).

Almost surely, 2^439656971 is an apocalyptic number.

439656971 is a deficient number, since it is larger than the sum of its proper divisors (33819781).

439656971 is a wasteful number, since it uses less digits than its factorization.

439656971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33819780.

The product of its digits is 1224720, while the sum is 50.

The square root of 439656971 is about 20967.9987361694. The cubic root of 439656971 is about 760.3927857684.

The spelling of 439656971 in words is "four hundred thirty-nine million, six hundred fifty-six thousand, nine hundred seventy-one".