489432121 has 4 divisors (see below), whose sum is σ = 490047012. Its totient is φ = 488817232.

The previous prime is 489432037. The next prime is 489432133. The reversal of 489432121 is 121234984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215032896 + 274399225 = 14664^2 + 16565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489432121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489432161) 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 in 3 ways as a sum of consecutive naturals, for example, 306250 + ... + 307843.

It is an arithmetic number, because the mean of its divisors is an integer number (122511753).

Almost surely, 2^489432121 is an apocalyptic number.

It is an amenable number.

489432121 is a deficient number, since it is larger than the sum of its proper divisors (614891).

489432121 is an equidigital number, since it uses as much as digits as its factorization.

489432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614890.

The product of its digits is 13824, while the sum is 34.

The square root of 489432121 is about 22123.1128234704. The cubic root of 489432121 is about 788.0688402372.

The spelling of 489432121 in words is "four hundred eighty-nine million, four hundred thirty-two thousand, one hundred twenty-one".