1997836 has 6 divisors (see below), whose sum is σ = 3496220. Its totient is φ = 998916.

The previous prime is 1997833. The next prime is 1997843. The reversal of 1997836 is 6387991.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1997792 and 1997801.

It is not an unprimeable number, because it can be changed into a prime (1997833) 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 as a sum of consecutive naturals, namely, 249726 + ... + 249733.

2^1997836 is an apocalyptic number.

It is an amenable number.

1997836 is a deficient number, since it is larger than the sum of its proper divisors (1498384).

1997836 is a wasteful number, since it uses less digits than its factorization.

1997836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499463 (or 499461 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 1997836 is about 1413.4482657671. The cubic root of 1997836 is about 125.9466474380.

The spelling of 1997836 in words is "one million, nine hundred ninety-seven thousand, eight hundred thirty-six".