1000994403 has 4 divisors (see below), whose sum is σ = 1334659208. Its totient is φ = 667329600.

The previous prime is 1000994399. The next prime is 1000994429. The reversal of 1000994403 is 3044990001.

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

It is not a de Polignac number, because 1000994403 - 2² = 1000994399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000994443) 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, 166832398 + ... + 166832403.

It is an arithmetic number, because the mean of its divisors is an integer number (333664802).

Almost surely, 2^1000994403 is an apocalyptic number.

1000994403 is a deficient number, since it is larger than the sum of its proper divisors (333664805).

1000994403 is an equidigital number, since it uses as much as digits as its factorization.

1000994403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333664804.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1000994403 is about 31638.4955868638. The cubic root of 1000994403 is about 1000.3313578565.

The spelling of 1000994403 in words is "one billion, nine hundred ninety-four thousand, four hundred three".