990027 has 12 divisors (see below), whose sum is σ = 1465464. Its totient is φ = 643680.

The previous prime is 990023. The next prime is 990037. The reversal of 990027 is 720099.

It is not a de Polignac number, because 990027 - 2² = 990023 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

990027 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (990023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 973 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (122122).

2⁹⁹⁰⁰²⁷ is an apocalyptic number.

990027 is a deficient number, since it is larger than the sum of its proper divisors (475437).

990027 is a wasteful number, since it uses less digits than its factorization.

990027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2727 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 990027 is about 995.0010050246. The cubic root of 990027 is about 99.6664553835. Note that the first 3 decimals are identical.

The spelling of 990027 in words is "nine hundred ninety thousand, twenty-seven".