489787983 has 6 divisors (see below), whose sum is σ = 707471544. Its totient is φ = 326525316.

The previous prime is 489787973. The next prime is 489787993. The reversal of 489787983 is 389787984.

489787983 is a `hidden beast` number, since 489 + 7 + 8 + 79 + 83 = 666.

It is an interprime number because it is at equal distance from previous prime (489787973) and next prime (489787993).

It is not a de Polignac number, because 489787983 - 2⁵ = 489787951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 489787983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489787933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27210435 + ... + 27210452.

It is an arithmetic number, because the mean of its divisors is an integer number (117911924).

Almost surely, 2^489787983 is an apocalyptic number.

489787983 is a deficient number, since it is larger than the sum of its proper divisors (217683561).

489787983 is a wasteful number, since it uses less digits than its factorization.

489787983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54420893 (or 54420890 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 489787983 is about 22131.1541271575. The cubic root of 489787983 is about 788.2597933845.

Subtracting from 489787983 its reverse (389787984), we obtain a palindrome (99999999).

The spelling of 489787983 in words is "four hundred eighty-nine million, seven hundred eighty-seven thousand, nine hundred eighty-three".