2809921343 has 4 divisors (see below), whose sum is σ = 2957811960. Its totient is φ = 2662030728.

The previous prime is 2809921319. The next prime is 2809921349. The reversal of 2809921343 is 3431299082.

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 2809921343 - 2²⁸ = 2541485887 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 2809921343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809921349) 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, 73945280 + ... + 73945317.

It is an arithmetic number, because the mean of its divisors is an integer number (739452990).

Almost surely, 2^2809921343 is an apocalyptic number.

2809921343 is a deficient number, since it is larger than the sum of its proper divisors (147890617).

2809921343 is a wasteful number, since it uses less digits than its factorization.

2809921343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147890616.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 2809921343 is about 53008.6912024811. The cubic root of 2809921343 is about 1411.1225142303.

The spelling of 2809921343 in words is "two billion, eight hundred nine million, nine hundred twenty-one thousand, three hundred forty-three".