489718621 has 8 divisors (see below), whose sum is σ = 578977920. Its totient is φ = 405284208.

The previous prime is 489718613. The next prime is 489718631. The reversal of 489718621 is 126817984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 489718621 - 2³ = 489718613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489718601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206001 + ... + 1206406.

It is an arithmetic number, because the mean of its divisors is an integer number (72372240).

Almost surely, 2^489718621 is an apocalyptic number.

It is an amenable number.

489718621 is a deficient number, since it is larger than the sum of its proper divisors (89259299).

489718621 is a wasteful number, since it uses less digits than its factorization.

489718621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412443.

The product of its digits is 193536, while the sum is 46.

The square root of 489718621 is about 22129.5870047319. The cubic root of 489718621 is about 788.2225814622. Note that the first 3 decimals are identical.

The spelling of 489718621 in words is "four hundred eighty-nine million, seven hundred eighteen thousand, six hundred twenty-one".