163280489 has 2 divisors, whose sum is σ = 163280490. Its totient is φ = 163280488.

The previous prime is 163280483. The next prime is 163280543. The reversal of 163280489 is 984082361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150798400 + 12482089 = 12280^2 + 3533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163280489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (163280483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81640244 + 81640245.

It is an arithmetic number, because the mean of its divisors is an integer number (81640245).

Almost surely, 2^163280489 is an apocalyptic number.

It is an amenable number.

163280489 is a deficient number, since it is larger than the sum of its proper divisors (1).

163280489 is an equidigital number, since it uses as much as digits as its factorization.

163280489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 163280489 is about 12778.1254102470. The cubic root of 163280489 is about 546.5687081979.

The spelling of 163280489 in words is "one hundred sixty-three million, two hundred eighty thousand, four hundred eighty-nine".