990803519 has 4 divisors (see below), whose sum is σ = 991398840. Its totient is φ = 990208200.

The previous prime is 990803459. The next prime is 990803557. The reversal of 990803519 is 915308099.

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

It is a cyclic number.

It is not a de Polignac number, because 990803519 - 2⁸ = 990803263 is a prime.

It is a super-2 number, since 2×990803519² = 1963383226525566722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990803519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990803599) 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, 295157 + ... + 298494.

It is an arithmetic number, because the mean of its divisors is an integer number (247849710).

Almost surely, 2^990803519 is an apocalyptic number.

990803519 is a deficient number, since it is larger than the sum of its proper divisors (595321).

990803519 is a wasteful number, since it uses less digits than its factorization.

990803519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595320.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 990803519 is about 31477.0316103663. The cubic root of 990803519 is about 996.9250607735.

The spelling of 990803519 in words is "nine hundred ninety million, eight hundred three thousand, five hundred nineteen".