1997937 has 12 divisors (see below), whose sum is σ = 2926404. Its totient is φ = 1313280.

The previous prime is 1997921. The next prime is 1997939. The reversal of 1997937 is 7397991.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 349281 = 1284^2 + 591^2 .

It is not a de Polignac number, because 1997937 - 2⁴ = 1997921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1997892 and 1997901.

It is not an unprimeable number, because it can be changed into a prime (1997939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 864 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (243867).

2^1997937 is an apocalyptic number.

It is an amenable number.

1997937 is a deficient number, since it is larger than the sum of its proper divisors (928467).

1997937 is a wasteful number, since it uses less digits than its factorization.

1997937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120 (or 3117 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 1997937 is about 1413.4839935422. The cubic root of 1997937 is about 125.9487698006.

The spelling of 1997937 in words is "one million, nine hundred ninety-seven thousand, nine hundred thirty-seven".