439872449 has 2 divisors, whose sum is σ = 439872450. Its totient is φ = 439872448.

The previous prime is 439872431. The next prime is 439872469. The reversal of 439872449 is 944278934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318872449 + 121000000 = 17857^2 + 11000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439872449 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 439872397 and 439872406.

It is not a weakly prime, because it can be changed into another prime (439872409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219936224 + 219936225.

It is an arithmetic number, because the mean of its divisors is an integer number (219936225).

Almost surely, 2^439872449 is an apocalyptic number.

It is an amenable number.

439872449 is a deficient number, since it is larger than the sum of its proper divisors (1).

439872449 is an equidigital number, since it uses as much as digits as its factorization.

439872449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 50.

The square root of 439872449 is about 20973.1363653603. The cubic root of 439872449 is about 760.5169895358.

The spelling of 439872449 in words is "four hundred thirty-nine million, eight hundred seventy-two thousand, four hundred forty-nine".