990049 has 4 divisors (see below), whose sum is σ = 995760. Its totient is φ = 984340.

The previous prime is 990043. The next prime is 990053. The reversal of 990049 is 940099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940099 = 271 ⋅3469.

It is a cyclic number.

It is not a de Polignac number, because 990049 - 2⁷ = 989921 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 990049.

It is not an unprimeable number, because it can be changed into a prime (990043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2587 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (248940).

2⁹⁹⁰⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

990049 is a deficient number, since it is larger than the sum of its proper divisors (5711).

990049 is a wasteful number, since it uses less digits than its factorization.

990049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 990049 is about 995.0120602284. The cubic root of 990049 is about 99.6671936279.

The spelling of 990049 in words is "nine hundred ninety thousand, forty-nine".