489780521 has 4 divisors (see below), whose sum is σ = 489845844. Its totient is φ = 489715200.

The previous prime is 489780517. The next prime is 489780541. The reversal of 489780521 is 125087984.

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 103225600 + 386554921 = 10160^2 + 19661^2 .

It is a cyclic number.

It is not a de Polignac number, because 489780521 - 2² = 489780517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489780541) 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, 19700 + ... + 36981.

It is an arithmetic number, because the mean of its divisors is an integer number (122461461).

Almost surely, 2^489780521 is an apocalyptic number.

It is an amenable number.

489780521 is a deficient number, since it is larger than the sum of its proper divisors (65323).

489780521 is an equidigital number, since it uses as much as digits as its factorization.

489780521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65322.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 489780521 is about 22130.9855406396. The cubic root of 489780521 is about 788.2557902752.

The spelling of 489780521 in words is "four hundred eighty-nine million, seven hundred eighty thousand, five hundred twenty-one".