489123791 has 8 divisors (see below), whose sum is σ = 526942080. Its totient is φ = 451333152.

The previous prime is 489123787. The next prime is 489123793. The reversal of 489123791 is 197321984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 489123791 - 2² = 489123787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489123793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43490 + ... + 53568.

It is an arithmetic number, because the mean of its divisors is an integer number (65867760).

Almost surely, 2^489123791 is an apocalyptic number.

489123791 is a deficient number, since it is larger than the sum of its proper divisors (37818289).

489123791 is a wasteful number, since it uses less digits than its factorization.

489123791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13825.

The product of its digits is 108864, while the sum is 44.

The square root of 489123791 is about 22116.1432216379. The cubic root of 489123791 is about 787.9033175850.

It can be divided in two parts, 4891 and 23791, that added together give a palindrome (28682).

The spelling of 489123791 in words is "four hundred eighty-nine million, one hundred twenty-three thousand, seven hundred ninety-one".