2109897 has 12 divisors (see below), whose sum is σ = 3094000. Its totient is φ = 1385208.

The previous prime is 2109889. The next prime is 2109911. The reversal of 2109897 is 7989012.

It is a happy number.

It is not a de Polignac number, because 2109897 - 2³ = 2109889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1147 + ... + 2352.

2^2109897 is an apocalyptic number.

It is an amenable number.

2109897 is a deficient number, since it is larger than the sum of its proper divisors (984103).

2109897 is a wasteful number, since it uses less digits than its factorization.

2109897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572 (or 3569 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2109897 is about 1452.5484501386. The cubic root of 2109897 is about 128.2587741794.

The spelling of 2109897 in words is "two million, one hundred nine thousand, eight hundred ninety-seven".