489201921 has 12 divisors (see below), whose sum is σ = 760980948. Its totient is φ = 301047264.

The previous prime is 489201887. The next prime is 489201941. The reversal of 489201921 is 129102984.

It can be written as a sum of positive squares in 2 ways, for example, as 314565696 + 174636225 = 17736^2 + 13215^2 .

It is not a de Polignac number, because 489201921 - 2¹⁴ = 489185537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489201941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2090490 + ... + 2090723.

It is an arithmetic number, because the mean of its divisors is an integer number (63415079).

Almost surely, 2^489201921 is an apocalyptic number.

It is an amenable number.

489201921 is a deficient number, since it is larger than the sum of its proper divisors (271779027).

489201921 is a wasteful number, since it uses less digits than its factorization.

489201921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181232 (or 4181229 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 489201921 is about 22117.9095079078. The cubic root of 489201921 is about 787.9452671622.

The spelling of 489201921 in words is "four hundred eighty-nine million, two hundred one thousand, nine hundred twenty-one".