489804621 has 4 divisors (see below), whose sum is σ = 653072832. Its totient is φ = 326536412.

The previous prime is 489804613. The next prime is 489804649. The reversal of 489804621 is 126408984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489804621 - 2³ = 489804613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489804611) 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, 81634101 + ... + 81634106.

It is an arithmetic number, because the mean of its divisors is an integer number (163268208).

Almost surely, 2^489804621 is an apocalyptic number.

It is an amenable number.

489804621 is a deficient number, since it is larger than the sum of its proper divisors (163268211).

489804621 is a wasteful number, since it uses less digits than its factorization.

489804621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163268210.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 489804621 is about 22131.5300194090. The cubic root of 489804621 is about 788.2687189593.

The spelling of 489804621 in words is "four hundred eighty-nine million, eight hundred four thousand, six hundred twenty-one".