439789121 has 2 divisors, whose sum is σ = 439789122. Its totient is φ = 439789120.

The previous prime is 439789109. The next prime is 439789171. The reversal of 439789121 is 121987934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388523521 + 51265600 = 19711^2 + 7160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439789121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (439789171) 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, 219894560 + 219894561.

It is an arithmetic number, because the mean of its divisors is an integer number (219894561).

Almost surely, 2^439789121 is an apocalyptic number.

It is an amenable number.

439789121 is a deficient number, since it is larger than the sum of its proper divisors (1).

439789121 is an equidigital number, since it uses as much as digits as its factorization.

439789121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 439789121 is about 20971.1497300458. The cubic root of 439789121 is about 760.4689632182.

The spelling of 439789121 in words is "four hundred thirty-nine million, seven hundred eighty-nine thousand, one hundred twenty-one".