990705 has 8 divisors (see below), whose sum is σ = 1585152. Its totient is φ = 528368.

The previous prime is 990673. The next prime is 990707. The reversal of 990705 is 507099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990705 - 2⁵ = 990673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990707) 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 7 ways as a sum of consecutive naturals, for example, 33009 + ... + 33038.

It is an arithmetic number, because the mean of its divisors is an integer number (198144).

2⁹⁹⁰⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

990705 is a deficient number, since it is larger than the sum of its proper divisors (594447).

990705 is a wasteful number, since it uses less digits than its factorization.

990705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66055.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 990705 is about 995.3416498871. The cubic root of 990705 is about 99.6892017116.

The spelling of 990705 in words is "nine hundred ninety thousand, seven hundred five".