999163 has 4 divisors (see below), whose sum is σ = 1090008. Its totient is φ = 908320.

The previous prime is 999149. The next prime is 999169. The reversal of 999163 is 361999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361999 = 11 ⋅32909.

It is a cyclic number.

It is not a de Polignac number, because 999163 - 2⁹ = 998651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45406 + ... + 45427.

It is an arithmetic number, because the mean of its divisors is an integer number (272502).

999163 is a Friedman number, since it can be written as (9+1)^6-93*9, using all its digits and the basic arithmetic operations.

2⁹⁹⁹¹⁶³ is an apocalyptic number.

999163 is a deficient number, since it is larger than the sum of its proper divisors (90845).

999163 is a wasteful number, since it uses less digits than its factorization.

999163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90844.

The product of its digits is 13122, while the sum is 37.

The square root of 999163 is about 999.5814123922. The cubic root of 999163 is about 99.9720922123.

The spelling of 999163 in words is "nine hundred ninety-nine thousand, one hundred sixty-three".