2809043047 has 2 divisors, whose sum is σ = 2809043048. Its totient is φ = 2809043046.

The previous prime is 2809042981. The next prime is 2809043057. The reversal of 2809043047 is 7403409082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2809043047 - 2⁷ = 2809042919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2809042997 and 2809043015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2809043057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404521523 + 1404521524.

It is an arithmetic number, because the mean of its divisors is an integer number (1404521524).

Almost surely, 2^2809043047 is an apocalyptic number.

2809043047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809043047 is an equidigital number, since it uses as much as digits as its factorization.

2809043047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 2809043047 is about 53000.4061022177. The cubic root of 2809043047 is about 1410.9754742410.

The spelling of 2809043047 in words is "two billion, eight hundred nine million, forty-three thousand, forty-seven".