489251899 has 2 divisors, whose sum is σ = 489251900. Its totient is φ = 489251898.

The previous prime is 489251849. The next prime is 489251921. The reversal of 489251899 is 998152984.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489251899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489251809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244625949 + 244625950.

It is an arithmetic number, because the mean of its divisors is an integer number (244625950).

Almost surely, 2^489251899 is an apocalyptic number.

489251899 is a deficient number, since it is larger than the sum of its proper divisors (1).

489251899 is an equidigital number, since it uses as much as digits as its factorization.

489251899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 55.

The square root of 489251899 is about 22119.0392874555. The cubic root of 489251899 is about 787.9720990190.

The spelling of 489251899 in words is "four hundred eighty-nine million, two hundred fifty-one thousand, eight hundred ninety-nine".