489111985 has 8 divisors (see below), whose sum is σ = 587500200. Its totient is φ = 390912384.

The previous prime is 489111979. The next prime is 489112021. The reversal of 489111985 is 589111984.

It can be written as a sum of positive squares in 4 ways, for example, as 265070961 + 224041024 = 16281^2 + 14968^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 489111985 - 2³ = 489111977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41382 + ... + 51871.

It is an arithmetic number, because the mean of its divisors is an integer number (73437525).

Almost surely, 2^489111985 is an apocalyptic number.

It is an amenable number.

489111985 is a deficient number, since it is larger than the sum of its proper divisors (98388215).

489111985 is a wasteful number, since it uses less digits than its factorization.

489111985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94307.

The product of its digits is 103680, while the sum is 46.

The square root of 489111985 is about 22115.8763109220. The cubic root of 489111985 is about 787.8969783163.

Subtracting 489111985 from its reverse (589111984), we obtain a palindrome (99999999).

The spelling of 489111985 in words is "four hundred eighty-nine million, one hundred eleven thousand, nine hundred eighty-five".