999863489 has 2 divisors, whose sum is σ = 999863490. Its totient is φ = 999863488.

The previous prime is 999863413. The next prime is 999863587. The reversal of 999863489 is 984368999.

999863489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998054464 + 1809025 = 31592^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 999863489 - 2⁸ = 999863233 is a prime.

It is not a weakly prime, because it can be changed into another prime (999863989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499931744 + 499931745.

It is an arithmetic number, because the mean of its divisors is an integer number (499931745).

Almost surely, 2^999863489 is an apocalyptic number.

It is an amenable number.

999863489 is a deficient number, since it is larger than the sum of its proper divisors (1).

999863489 is an equidigital number, since it uses as much as digits as its factorization.

999863489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30233088, while the sum is 65.

The square root of 999863489 is about 31620.6180995881. The cubic root of 999863489 is about 999.9544942626.

The spelling of 999863489 in words is "nine hundred ninety-nine million, eight hundred sixty-three thousand, four hundred eighty-nine".