489683672857 has 4 divisors (see below), whose sum is σ = 502918366756. Its totient is φ = 476448978960.

The previous prime is 489683672809. The next prime is 489683672867. The reversal of 489683672857 is 758276386984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180396422361 + 309287250496 = 424731^2 + 556136^2 .

It is a cyclic number.

It is not a de Polignac number, because 489683672857 - 2⁷ = 489683672729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489683672857.

It is not an unprimeable number, because it can be changed into a prime (489683672867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6617346894 + ... + 6617346967.

It is an arithmetic number, because the mean of its divisors is an integer number (125729591689).

Almost surely, 2^489683672857 is an apocalyptic number.

It is an amenable number.

489683672857 is a deficient number, since it is larger than the sum of its proper divisors (13234693899).

489683672857 is a wasteful number, since it uses less digits than its factorization.

489683672857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13234693898.

The product of its digits is 975421440, while the sum is 73.

The spelling of 489683672857 in words is "four hundred eighty-nine billion, six hundred eighty-three million, six hundred seventy-two thousand, eight hundred fifty-seven".