489801021 has 16 divisors (see below), whose sum is σ = 663770304. Its totient is φ = 321197184.

The previous prime is 489801007. The next prime is 489801073. The reversal of 489801021 is 120108984.

It is not a de Polignac number, because 489801021 - 2¹³ = 489792829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489801121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190275 + ... + 192831.

It is an arithmetic number, because the mean of its divisors is an integer number (41485644).

Almost surely, 2^489801021 is an apocalyptic number.

It is an amenable number.

489801021 is a deficient number, since it is larger than the sum of its proper divisors (173969283).

489801021 is a wasteful number, since it uses less digits than its factorization.

489801021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 489801021 is about 22131.4486873318. The cubic root of 489801021 is about 788.2667877305.

The spelling of 489801021 in words is "four hundred eighty-nine million, eight hundred one thousand, twenty-one".