2056894009 has 2 divisors, whose sum is σ = 2056894010. Its totient is φ = 2056894008.

The previous prime is 2056893997. The next prime is 2056894067. The reversal of 2056894009 is 9004986502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1766941225 + 289952784 = 42035^2 + 17028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056894009 - 2¹⁵ = 2056861241 is a prime.

It is not a weakly prime, because it can be changed into another prime (2056894079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028447004 + 1028447005.

It is an arithmetic number, because the mean of its divisors is an integer number (1028447005).

Almost surely, 2^2056894009 is an apocalyptic number.

It is an amenable number.

2056894009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056894009 is an equidigital number, since it uses as much as digits as its factorization.

2056894009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 2056894009 is about 45352.9933852221. The cubic root of 2056894009 is about 1271.7565148528.

The spelling of 2056894009 in words is "two billion, fifty-six million, eight hundred ninety-four thousand, nine".