1008999 has 6 divisors (see below), whose sum is σ = 1457456. Its totient is φ = 672660.

The previous prime is 1008991. The next prime is 1009007. The reversal of 1008999 is 9998001.

It is an interprime number because it is at equal distance from previous prime (1008991) and next prime (1009007).

It is not a de Polignac number, because 1008999 - 2³ = 1008991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1008991) 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 in 5 ways as a sum of consecutive naturals, for example, 56047 + ... + 56064.

2^1008999 is an apocalyptic number.

1008999 is a deficient number, since it is larger than the sum of its proper divisors (448457).

1008999 is a wasteful number, since it uses less digits than its factorization.

1008999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112117 (or 112114 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1008999 is about 1004.4894225426. The cubic root of 1008999 is about 100.2990713383.

The spelling of 1008999 in words is "one million, eight thousand, nine hundred ninety-nine".