488991 has 4 divisors (see below), whose sum is σ = 651992. Its totient is φ = 325992.

The previous prime is 488981. The next prime is 488993. The reversal of 488991 is 199884.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 488991 - 2⁵ = 488959 is a prime.

It is a super-2 number, since 2×488991² = 478224396162, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (488993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81496 + ... + 81501.

It is an arithmetic number, because the mean of its divisors is an integer number (162998).

2⁴⁸⁸⁹⁹¹ is an apocalyptic number.

488991 is a deficient number, since it is larger than the sum of its proper divisors (163001).

488991 is a wasteful number, since it uses less digits than its factorization.

488991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163000.

The product of its digits is 20736, while the sum is 39.

The square root of 488991 is about 699.2789143110. The cubic root of 488991 is about 78.7832009162.

The spelling of 488991 in words is "four hundred eighty-eight thousand, nine hundred ninety-one".