2001897 has 24 divisors (see below), whose sum is σ = 3182400. Its totient is φ = 1207008.

The previous prime is 2001847. The next prime is 2001911. The reversal of 2001897 is 7981002.

It is not a de Polignac number, because 2001897 - 2⁶ = 2001833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001847) 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 23 ways as a sum of consecutive naturals, for example, 3679 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (132600).

2^2001897 is an apocalyptic number.

It is an amenable number.

2001897 is a deficient number, since it is larger than the sum of its proper divisors (1180503).

2001897 is a wasteful number, since it uses less digits than its factorization.

2001897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 2001897 is about 1414.8840941929. The cubic root of 2001897 is about 126.0319269056.

Adding to 2001897 its reverse (7981002), we get a palindrome (9982899).

The spelling of 2001897 in words is "two million, one thousand, eight hundred ninety-seven".