999997003 has 4 divisors (see below), whose sum is σ = 1008846648. Its totient is φ = 991147360.

The previous prime is 999996989. The next prime is 999997021. The reversal of 999997003 is 300799999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999997003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999997403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4424653 + ... + 4424878.

It is an arithmetic number, because the mean of its divisors is an integer number (252211662).

Almost surely, 2^999997003 is an apocalyptic number.

999997003 is a deficient number, since it is larger than the sum of its proper divisors (8849645).

999997003 is a wasteful number, since it uses less digits than its factorization.

999997003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8849644.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 999997003 is about 31622.7292149176. The cubic root of 999997003 is about 999.9990009990. Note that the first 3 decimals are identical.

The spelling of 999997003 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, three".