489731811 has 8 divisors (see below), whose sum is σ = 653624400. Its totient is φ = 326163552.

The previous prime is 489731797. The next prime is 489731833. The reversal of 489731811 is 118137984.

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

It is not a de Polignac number, because 489731811 - 2¹¹ = 489729763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489730811) 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, 77536 + ... + 83613.

It is an arithmetic number, because the mean of its divisors is an integer number (81703050).

Almost surely, 2^489731811 is an apocalyptic number.

489731811 is a deficient number, since it is larger than the sum of its proper divisors (163892589).

489731811 is a wasteful number, since it uses less digits than its factorization.

489731811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162165.

The product of its digits is 48384, while the sum is 42.

The square root of 489731811 is about 22129.8850200357. The cubic root of 489731811 is about 788.2296580174.

The spelling of 489731811 in words is "four hundred eighty-nine million, seven hundred thirty-one thousand, eight hundred eleven".