489731669 has 16 divisors (see below), whose sum is σ = 597233280. Its totient is φ = 392221440.

The previous prime is 489731647. The next prime is 489731689. The reversal of 489731669 is 966137984.

It is a cyclic number.

It is not a de Polignac number, because 489731669 - 2⁸ = 489731413 is a prime.

It is a super-2 number, since 2×489731669² = 479674215243051122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 489731669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489731629) 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, 15512 + ... + 34929.

It is an arithmetic number, because the mean of its divisors is an integer number (37327080).

Almost surely, 2^489731669 is an apocalyptic number.

It is an amenable number.

489731669 is a deficient number, since it is larger than the sum of its proper divisors (107501611).

489731669 is a wasteful number, since it uses less digits than its factorization.

489731669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50540.

The product of its digits is 1959552, while the sum is 53.

The square root of 489731669 is about 22129.8818117043. The cubic root of 489731669 is about 788.2295818338.

The spelling of 489731669 in words is "four hundred eighty-nine million, seven hundred thirty-one thousand, six hundred sixty-nine".