990017 has 8 divisors (see below), whose sum is σ = 1138176. Its totient is φ = 843552.

The previous prime is 990013. The next prime is 990023. The reversal of 990017 is 710099.

990017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 990017 - 2² = 990013 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990017.

It is not an unprimeable number, because it can be changed into a prime (990013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (142272).

2⁹⁹⁰⁰¹⁷ is an apocalyptic number.

It is an amenable number.

990017 is a deficient number, since it is larger than the sum of its proper divisors (148159).

990017 is a wasteful number, since it uses less digits than its factorization.

990017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 990017 is about 994.9959798914. The cubic root of 990017 is about 99.6661198142. Note that the first 3 decimals are identical.

The spelling of 990017 in words is "nine hundred ninety thousand, seventeen".