489990681 has 16 divisors (see below), whose sum is σ = 749329920. Its totient is φ = 316122480.

The previous prime is 489990679. The next prime is 489990691. The reversal of 489990681 is 186099984.

It is not a de Polignac number, because 489990681 - 2¹ = 489990679 is a prime.

It is a super-2 number, since 2×489990681² = 480181734933687522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489990661) 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, 291870 + ... + 293543.

It is an arithmetic number, because the mean of its divisors is an integer number (46833120).

Almost surely, 2^489990681 is an apocalyptic number.

It is an amenable number.

489990681 is a deficient number, since it is larger than the sum of its proper divisors (259339239).

489990681 is a wasteful number, since it uses less digits than its factorization.

489990681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585453 (or 585447 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 489990681 is about 22135.7331254241. The cubic root of 489990681 is about 788.3685184198.

The spelling of 489990681 in words is "four hundred eighty-nine million, nine hundred ninety thousand, six hundred eighty-one".