489951 has 36 divisors (see below), whose sum is σ = 906984. Its totient is φ = 252000.

The previous prime is 489943. The next prime is 489959. The reversal of 489951 is 159984.

It is an interprime number because it is at equal distance from previous prime (489943) and next prime (489959).

It is not a de Polignac number, because 489951 - 2³ = 489943 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489959) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4801 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (25194).

2⁴⁸⁹⁹⁵¹ is an apocalyptic number.

489951 is a deficient number, since it is larger than the sum of its proper divisors (417033).

489951 is a wasteful number, since it uses less digits than its factorization.

489951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 122 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 489951 is about 699.9649991250. The cubic root of 489951 is about 78.8347236317.

Multiplying 489951 by its reverse (159984), we get a square (78384320784 = 279972²).

It can be divided in two parts, 4899 and 51, that added together give a triangular number (4950 = T₉₉).

The spelling of 489951 in words is "four hundred eighty-nine thousand, nine hundred fifty-one".