489731 has 6 divisors (see below), whose sum is σ = 536796. Its totient is φ = 443100.

The previous prime is 489691. The next prime is 489733. The reversal of 489731 is 137984.

It is a de Polignac number, because none of the positive numbers 2^k-489731 is a prime.

It is a super-2 number, since 2×489731² = 479672904722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489733) 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, 2216 + ... + 2426.

It is an arithmetic number, because the mean of its divisors is an integer number (89466).

2⁴⁸⁹⁷³¹ is an apocalyptic number.

489731 is a deficient number, since it is larger than the sum of its proper divisors (47065).

489731 is an equidigital number, since it uses as much as digits as its factorization.

489731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 222 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 489731 is about 699.8078307650. The cubic root of 489731 is about 78.8229222912.

Multiplying 489731 by its reverse (137984), we get a square (67575042304 = 259952²).

It can be divided in two parts, 48 and 9731, that added together give a palindrome (9779).

The spelling of 489731 in words is "four hundred eighty-nine thousand, seven hundred thirty-one".