2813844809 has 2 divisors, whose sum is σ = 2813844810. Its totient is φ = 2813844808.

The previous prime is 2813844769. The next prime is 2813844821. The reversal of 2813844809 is 9084483182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2806032784 + 7812025 = 52972^2 + 2795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2813844809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2813844899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406922404 + 1406922405.

It is an arithmetic number, because the mean of its divisors is an integer number (1406922405).

Almost surely, 2^2813844809 is an apocalyptic number.

It is an amenable number.

2813844809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2813844809 is an equidigital number, since it uses as much as digits as its factorization.

2813844809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 2813844809 is about 53045.6860545700. The cubic root of 2813844809 is about 1411.7789876897.

The spelling of 2813844809 in words is "two billion, eight hundred thirteen million, eight hundred forty-four thousand, eight hundred nine".