990567 has 6 divisors (see below), whose sum is σ = 1430832. Its totient is φ = 660372.

The previous prime is 990559. The next prime is 990589. The reversal of 990567 is 765099.

990567 is a `hidden beast` number, since 9 + 90 + 567 = 666.

It is not a de Polignac number, because 990567 - 2³ = 990559 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990567.

It is not an unprimeable number, because it can be changed into a prime (990547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55023 + ... + 55040.

It is an arithmetic number, because the mean of its divisors is an integer number (238472).

2⁹⁹⁰⁵⁶⁷ is an apocalyptic number.

990567 is a deficient number, since it is larger than the sum of its proper divisors (440265).

990567 is a wasteful number, since it uses less digits than its factorization.

990567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110069 (or 110066 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 990567 is about 995.2723245424. The cubic root of 990567 is about 99.6845727694.

The spelling of 990567 in words is "nine hundred ninety thousand, five hundred sixty-seven".