1988163 has 6 divisors (see below), whose sum is σ = 2871804. Its totient is φ = 1325436.

The previous prime is 1988137. The next prime is 1988177. The reversal of 1988163 is 3618891.

It is not a de Polignac number, because 1988163 - 2¹⁷ = 1857091 is a prime.

It is a super-2 number, since 2×1988163² = 7905584229138, which contains 22 as substring.

1988163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1988113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110445 + ... + 110462.

It is an arithmetic number, because the mean of its divisors is an integer number (478634).

2^1988163 is an apocalyptic number.

1988163 is a deficient number, since it is larger than the sum of its proper divisors (883641).

1988163 is a wasteful number, since it uses less digits than its factorization.

1988163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220913 (or 220910 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1988163 is about 1410.0223402486. The cubic root of 1988163 is about 125.7430515760.

The spelling of 1988163 in words is "one million, nine hundred eighty-eight thousand, one hundred sixty-three".