1997163 has 16 divisors (see below), whose sum is σ = 3381760. Its totient is φ = 1141128.

The previous prime is 1997161. The next prime is 1997173. The reversal of 1997163 is 3617991.

It is not a de Polignac number, because 1997163 - 2¹ = 1997161 is a prime.

It is a Duffinian number.

1997163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1997161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 5472.

It is an arithmetic number, because the mean of its divisors is an integer number (211360).

2^1997163 is an apocalyptic number.

1997163 is a deficient number, since it is larger than the sum of its proper divisors (1384597).

1997163 is a wasteful number, since it uses less digits than its factorization.

1997163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583 (or 10577 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1997163 is about 1413.2101754516. The cubic root of 1997163 is about 125.9325035321.

The spelling of 1997163 in words is "one million, nine hundred ninety-seven thousand, one hundred sixty-three".