2809005398473 has 2 divisors, whose sum is σ = 2809005398474. Its totient is φ = 2809005398472.

The previous prime is 2809005398443. The next prime is 2809005398483. The reversal of 2809005398473 is 3748935009082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2559897601024 + 249107797449 = 1599968^2 + 499107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2809005398473 is a prime.

It is a super-2 number, since 2×2809005398473² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2809005398413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404502699236 + 1404502699237.

It is an arithmetic number, because the mean of its divisors is an integer number (1404502699237).

Almost surely, 2^{2809005398473} is an apocalyptic number.

It is an amenable number.

2809005398473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809005398473 is an equidigital number, since it uses as much as digits as its factorization.

2809005398473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 2809005398473 in words is "two trillion, eight hundred nine billion, five million, three hundred ninety-eight thousand, four hundred seventy-three".