2809338523 has 4 divisors (see below), whose sum is σ = 2825577648. Its totient is φ = 2793099400.

The previous prime is 2809338503. The next prime is 2809338527. The reversal of 2809338523 is 3258339082.

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 2809338523 - 2¹⁷ = 2809207451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2809338523.

It is not an unprimeable number, because it can be changed into a prime (2809338527) 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, 8119303 + ... + 8119648.

It is an arithmetic number, because the mean of its divisors is an integer number (706394412).

Almost surely, 2^2809338523 is an apocalyptic number.

2809338523 is a deficient number, since it is larger than the sum of its proper divisors (16239125).

2809338523 is a wasteful number, since it uses less digits than its factorization.

2809338523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16239124.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 2809338523 is about 53003.1935169948. The cubic root of 2809338523 is about 1411.0249447979.

The spelling of 2809338523 in words is "two billion, eight hundred nine million, three hundred thirty-eight thousand, five hundred twenty-three".