439531317 has 6 divisors (see below), whose sum is σ = 634878582. Its totient is φ = 293020872.

The previous prime is 439531307. The next prime is 439531319. The reversal of 439531317 is 713135934.

It can be written as a sum of positive squares in only one way, i.e., 416404836 + 23126481 = 20406^2 + 4809^2 .

It is not a de Polignac number, because 439531317 - 2²² = 435337013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439531319) 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, 24418398 + ... + 24418415.

It is an arithmetic number, because the mean of its divisors is an integer number (105813097).

Almost surely, 2^439531317 is an apocalyptic number.

It is an amenable number.

439531317 is a deficient number, since it is larger than the sum of its proper divisors (195347265).

439531317 is a wasteful number, since it uses less digits than its factorization.

439531317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48836819 (or 48836816 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 439531317 is about 20965.0021941330. The cubic root of 439531317 is about 760.3203387584.

The spelling of 439531317 in words is "four hundred thirty-nine million, five hundred thirty-one thousand, three hundred seventeen".