2100899243 has 4 divisors (see below), whose sum is σ = 2102493360. Its totient is φ = 2099305128.

The previous prime is 2100899167. The next prime is 2100899261. The reversal of 2100899243 is 3429980012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100899243 - 2²⁰ = 2099850667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100899197 and 2100899206.

It is not an unprimeable number, because it can be changed into a prime (2100899743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795080 + ... + 797717.

It is an arithmetic number, because the mean of its divisors is an integer number (525623340).

Almost surely, 2^2100899243 is an apocalyptic number.

2100899243 is a deficient number, since it is larger than the sum of its proper divisors (1594117).

2100899243 is a wasteful number, since it uses less digits than its factorization.

2100899243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594116.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2100899243 is about 45835.5674449439. The cubic root of 2100899243 is about 1280.7619249113.

The spelling of 2100899243 in words is "two billion, one hundred million, eight hundred ninety-nine thousand, two hundred forty-three".