489627881 has 2 divisors, whose sum is σ = 489627882. Its totient is φ = 489627880.

The previous prime is 489627823. The next prime is 489627883. The reversal of 489627881 is 188726984.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441672256 + 47955625 = 21016^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 489627881 - 2¹⁰ = 489626857 is a prime.

It is a super-2 number, since 2×489627881² = 479470923705100322, which contains 22 as substring.

Together with 489627883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489627883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244813940 + 244813941.

It is an arithmetic number, because the mean of its divisors is an integer number (244813941).

Almost surely, 2^489627881 is an apocalyptic number.

It is an amenable number.

489627881 is a deficient number, since it is larger than the sum of its proper divisors (1).

489627881 is an equidigital number, since it uses as much as digits as its factorization.

489627881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 53.

The square root of 489627881 is about 22127.5367133353. The cubic root of 489627881 is about 788.1738951814.

The spelling of 489627881 in words is "four hundred eighty-nine million, six hundred twenty-seven thousand, eight hundred eighty-one".