1028999 has 2 divisors, whose sum is σ = 1029000. Its totient is φ = 1028998.

The previous prime is 1028981. The next prime is 1029001. The reversal of 1028999 is 9998201.

It is a strong prime.

It is an emirp because it is prime and its reverse (9998201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028999 is a prime.

It is a Sophie Germain prime.

Together with 1029001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028939) 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, 514499 + 514500.

It is an arithmetic number, because the mean of its divisors is an integer number (514500).

2^1028999 is an apocalyptic number.

1028999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028999 is an equidigital number, since it uses as much as digits as its factorization.

1028999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1028999 is about 1014.3958793292. The cubic root of 1028999 is about 100.9574372174.

The spelling of 1028999 in words is "one million, twenty-eight thousand, nine hundred ninety-nine".