439379257 has 2 divisors, whose sum is σ = 439379258. Its totient is φ = 439379256.

The previous prime is 439379231. The next prime is 439379363. The reversal of 439379257 is 752973934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438525481 + 853776 = 20941^2 + 924^2 .

It is a cyclic number.

It is not a de Polignac number, because 439379257 - 2¹⁵ = 439346489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 439379257.

It is not a weakly prime, because it can be changed into another prime (439370257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219689628 + 219689629.

It is an arithmetic number, because the mean of its divisors is an integer number (219689629).

Almost surely, 2^439379257 is an apocalyptic number.

It is an amenable number.

439379257 is a deficient number, since it is larger than the sum of its proper divisors (1).

439379257 is an equidigital number, since it uses as much as digits as its factorization.

439379257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 49.

The square root of 439379257 is about 20961.3753604099. The cubic root of 439379257 is about 760.2326486505.

The spelling of 439379257 in words is "four hundred thirty-nine million, three hundred seventy-nine thousand, two hundred fifty-seven".