2005801807 has 2 divisors, whose sum is σ = 2005801808. Its totient is φ = 2005801806.

The previous prime is 2005801781. The next prime is 2005801813. The reversal of 2005801807 is 7081085002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2005801807 - 2²⁷ = 1871584079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005801507) 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, 1002900903 + 1002900904.

It is an arithmetic number, because the mean of its divisors is an integer number (1002900904).

Almost surely, 2^2005801807 is an apocalyptic number.

2005801807 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005801807 is an equidigital number, since it uses as much as digits as its factorization.

2005801807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2005801807 is about 44786.1787496991. The cubic root of 2005801807 is about 1261.1381768576.

Adding to 2005801807 its reverse (7081085002), we get a palindrome (9086886809).

The spelling of 2005801807 in words is "two billion, five million, eight hundred one thousand, eight hundred seven".