2099897 has 4 divisors (see below), whose sum is σ = 2151156. Its totient is φ = 2048640.

The previous prime is 2099893. The next prime is 2099921. The reversal of 2099897 is 7989902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 1752976 = 589^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2099897 - 2² = 2099893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2099893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25568 + ... + 25649.

It is an arithmetic number, because the mean of its divisors is an integer number (537789).

2^2099897 is an apocalyptic number.

It is an amenable number.

2099897 is a deficient number, since it is larger than the sum of its proper divisors (51259).

2099897 is an equidigital number, since it uses as much as digits as its factorization.

2099897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51258.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2099897 is about 1449.1021358069. The cubic root of 2099897 is about 128.0558228192.

The spelling of 2099897 in words is "two million, ninety-nine thousand, eight hundred ninety-seven".