2043672209 has 4 divisors (see below), whose sum is σ = 2082232116. Its totient is φ = 2005112304.

The previous prime is 2043672109. The next prime is 2043672217. The reversal of 2043672209 is 9022763402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9022763402 = 2 ⋅4511381701.

It can be written as a sum of positive squares in 2 ways, for example, as 1620465025 + 423207184 = 40255^2 + 20572^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043672209 - 2⁸ = 2043671953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043672299) 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, 19279874 + ... + 19279979.

It is an arithmetic number, because the mean of its divisors is an integer number (520558029).

Almost surely, 2^2043672209 is an apocalyptic number.

It is an amenable number.

2043672209 is a deficient number, since it is larger than the sum of its proper divisors (38559907).

2043672209 is an equidigital number, since it uses as much as digits as its factorization.

2043672209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38559906.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 2043672209 is about 45206.9929214497. The cubic root of 2043672209 is about 1269.0256873020.

The spelling of 2043672209 in words is "two billion, forty-three million, six hundred seventy-two thousand, two hundred nine".