439804889 has 2 divisors, whose sum is σ = 439804890. Its totient is φ = 439804888.

The previous prime is 439804879. The next prime is 439804931. The reversal of 439804889 is 988408934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379587289 + 60217600 = 19483^2 + 7760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439804889 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 439804889.

It is not a weakly prime, because it can be changed into another prime (439804879) 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, 219902444 + 219902445.

It is an arithmetic number, because the mean of its divisors is an integer number (219902445).

Almost surely, 2^439804889 is an apocalyptic number.

It is an amenable number.

439804889 is a deficient number, since it is larger than the sum of its proper divisors (1).

439804889 is an equidigital number, since it uses as much as digits as its factorization.

439804889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 439804889 is about 20971.5256717293. The cubic root of 439804889 is about 760.4780516128.

The spelling of 439804889 in words is "four hundred thirty-nine million, eight hundred four thousand, eight hundred eighty-nine".