489551 has 2 divisors, whose sum is σ = 489552. Its totient is φ = 489550.

The previous prime is 489539. The next prime is 489553. The reversal of 489551 is 155984.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489551 - 2⁶ = 489487 is a prime.

It is a Sophie Germain prime.

Together with 489553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244775 + 244776.

It is an arithmetic number, because the mean of its divisors is an integer number (244776).

2⁴⁸⁹⁵⁵¹ is an apocalyptic number.

489551 is a deficient number, since it is larger than the sum of its proper divisors (1).

489551 is an equidigital number, since it uses as much as digits as its factorization.

489551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 489551 is about 699.6792122109. The cubic root of 489551 is about 78.8132640199.

The spelling of 489551 in words is "four hundred eighty-nine thousand, five hundred fifty-one".