990170 has 8 divisors (see below), whose sum is σ = 1782324. Its totient is φ = 396064.

The previous prime is 990169. The next prime is 990179. The reversal of 990170 is 71099.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 192721 = 893^2 + 439^2 .

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

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990170.

It is not an unprimeable number, because it can be changed into a prime (990179) 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 3 ways as a sum of consecutive naturals, for example, 49499 + ... + 49518.

2⁹⁹⁰¹⁷⁰ is an apocalyptic number.

990170 is a deficient number, since it is larger than the sum of its proper divisors (792154).

990170 is a wasteful number, since it uses less digits than its factorization.

990170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99024.

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

The square root of 990170 is about 995.0728616539. The cubic root of 990170 is about 99.6712537768.

The spelling of 990170 in words is "nine hundred ninety thousand, one hundred seventy".