8049380209 has 4 divisors (see below), whose sum is σ = 8668563316. Its totient is φ = 7430197104.

The previous prime is 8049380203. The next prime is 8049380239. The reversal of 8049380209 is 9020839408.

It is a happy number.

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 5493774400 + 2555605809 = 74120^2 + 50553^2 .

It is a cyclic number.

It is not a de Polignac number, because 8049380209 - 2⁵ = 8049380177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8049380203) 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, 309591534 + ... + 309591559.

It is an arithmetic number, because the mean of its divisors is an integer number (2167140829).

Almost surely, 2^8049380209 is an apocalyptic number.

It is an amenable number.

8049380209 is a deficient number, since it is larger than the sum of its proper divisors (619183107).

8049380209 is a wasteful number, since it uses less digits than its factorization.

8049380209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619183106.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 8049380209 is about 89718.3381979403. The cubic root of 8049380209 is about 2004.1065796474.

The spelling of 8049380209 in words is "eight billion, forty-nine million, three hundred eighty thousand, two hundred nine".