990177 has 8 divisors (see below), whose sum is σ = 1326720. Its totient is φ = 656880.

The previous prime is 990169. The next prime is 990179. The reversal of 990177 is 771099.

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

It is not a de Polignac number, because 990177 - 2³ = 990169 is a prime.

It is an Ulam number.

990177 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (990179) 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, 27 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (165840).

2⁹⁹⁰¹⁷⁷ is an apocalyptic number.

It is an amenable number.

990177 is a deficient number, since it is larger than the sum of its proper divisors (336543).

990177 is a wasteful number, since it uses less digits than its factorization.

990177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 990177 is about 995.0763789780. The cubic root of 990177 is about 99.6714886514.

The spelling of 990177 in words is "nine hundred ninety thousand, one hundred seventy-seven".