489161871 has 24 divisors (see below), whose sum is σ = 775442304. Its totient is φ = 294676560.

The previous prime is 489161863. The next prime is 489161891. The reversal of 489161871 is 178161984.

It is a happy number.

489161871 is a `hidden beast` number, since 489 + 161 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 489161871 - 2³ = 489161863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489161801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1740 + ... + 31326.

It is an arithmetic number, because the mean of its divisors is an integer number (32310096).

Almost surely, 2^489161871 is an apocalyptic number.

489161871 is a deficient number, since it is larger than the sum of its proper divisors (286280433).

489161871 is a wasteful number, since it uses less digits than its factorization.

489161871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29771 (or 29768 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 489161871 is about 22117.0041144817. The cubic root of 489161871 is about 787.9237640652.

The spelling of 489161871 in words is "four hundred eighty-nine million, one hundred sixty-one thousand, eight hundred seventy-one".