489322721 has 4 divisors (see below), whose sum is σ = 489429444. Its totient is φ = 489216000.

The previous prime is 489322651. The next prime is 489322727. The reversal of 489322721 is 127223984.

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 103632400 + 385690321 = 10180^2 + 19639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489322721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489322727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46160 + ... + 55761.

It is an arithmetic number, because the mean of its divisors is an integer number (122357361).

Almost surely, 2^489322721 is an apocalyptic number.

It is an amenable number.

489322721 is a deficient number, since it is larger than the sum of its proper divisors (106723).

489322721 is a wasteful number, since it uses less digits than its factorization.

489322721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106722.

The product of its digits is 48384, while the sum is 38.

The square root of 489322721 is about 22120.6401580063. The cubic root of 489322721 is about 788.0101183349.

The spelling of 489322721 in words is "four hundred eighty-nine million, three hundred twenty-two thousand, seven hundred twenty-one".