990883 has 4 divisors (see below), whose sum is σ = 995440. Its totient is φ = 986328.

The previous prime is 990881. The next prime is 990887. The reversal of 990883 is 388099.

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 990883 - 2¹ = 990881 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (990881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (248860).

2⁹⁹⁰⁸⁸³ is an apocalyptic number.

990883 is a deficient number, since it is larger than the sum of its proper divisors (4557).

990883 is a wasteful number, since it uses less digits than its factorization.

990883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 990883 is about 995.4310624046. The cubic root of 990883 is about 99.6951717415.

The spelling of 990883 in words is "nine hundred ninety thousand, eight hundred eighty-three".