489766981 has 12 divisors (see below), whose sum is σ = 544836096. Its totient is φ = 439869320.

The previous prime is 489766967. The next prime is 489767041. The reversal of 489766981 is 189667984.

It is not a de Polignac number, because 489766981 - 2¹⁵ = 489734213 is a prime.

It is a super-2 number, since 2×489766981² = 479743391355708722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489766951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14341 + ... + 34426.

It is an arithmetic number, because the mean of its divisors is an integer number (45403008).

Almost surely, 2^489766981 is an apocalyptic number.

It is an amenable number.

489766981 is a deficient number, since it is larger than the sum of its proper divisors (55069115).

489766981 is a wasteful number, since it uses less digits than its factorization.

489766981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48872 (or 48861 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 489766981 is about 22130.6796325825. The cubic root of 489766981 is about 788.2485264218.

The spelling of 489766981 in words is "four hundred eighty-nine million, seven hundred sixty-six thousand, nine hundred eighty-one".