2005853869 has 2 divisors, whose sum is σ = 2005853870. Its totient is φ = 2005853868.

The previous prime is 2005853833. The next prime is 2005853887. The reversal of 2005853869 is 9683585002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1995855625 + 9998244 = 44675^2 + 3162^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005853869 - 2²¹ = 2003756717 is a prime.

It is a super-2 number, since 2×2005853869² = 8046899487564538322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005853819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002926934 + 1002926935.

It is an arithmetic number, because the mean of its divisors is an integer number (1002926935).

Almost surely, 2^2005853869 is an apocalyptic number.

It is an amenable number.

2005853869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005853869 is an equidigital number, since it uses as much as digits as its factorization.

2005853869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 2005853869 is about 44786.7599743496. The cubic root of 2005853869 is about 1261.1490880067.

The spelling of 2005853869 in words is "two billion, five million, eight hundred fifty-three thousand, eight hundred sixty-nine".