439979317 has 2 divisors, whose sum is σ = 439979318. Its totient is φ = 439979316.

The previous prime is 439979299. The next prime is 439979377. The reversal of 439979317 is 713979934.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418366116 + 21613201 = 20454^2 + 4649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439979317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439979377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219989658 + 219989659.

It is an arithmetic number, because the mean of its divisors is an integer number (219989659).

Almost surely, 2^439979317 is an apocalyptic number.

It is an amenable number.

439979317 is a deficient number, since it is larger than the sum of its proper divisors (1).

439979317 is an equidigital number, since it uses as much as digits as its factorization.

439979317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 52.

The square root of 439979317 is about 20975.6839459408. The cubic root of 439979317 is about 760.5785743192.

The spelling of 439979317 in words is "four hundred thirty-nine million, nine hundred seventy-nine thousand, three hundred seventeen".