489256993 has 2 divisors, whose sum is σ = 489256994. Its totient is φ = 489256992.

The previous prime is 489256987. The next prime is 489257009. The reversal of 489256993 is 399652984.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343620369 + 145636624 = 18537^2 + 12068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489256993 is a prime.

It is not a weakly prime, because it can be changed into another prime (489256903) 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 as a sum of consecutive naturals, namely, 244628496 + 244628497.

It is an arithmetic number, because the mean of its divisors is an integer number (244628497).

Almost surely, 2^489256993 is an apocalyptic number.

It is an amenable number.

489256993 is a deficient number, since it is larger than the sum of its proper divisors (1).

489256993 is an equidigital number, since it uses as much as digits as its factorization.

489256993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 55.

The square root of 489256993 is about 22119.1544368224. The cubic root of 489256993 is about 787.9748337493.

The spelling of 489256993 in words is "four hundred eighty-nine million, two hundred fifty-six thousand, nine hundred ninety-three".