2005445369 has 2 divisors, whose sum is σ = 2005445370. Its totient is φ = 2005445368.

The previous prime is 2005445363. The next prime is 2005445447. The reversal of 2005445369 is 9635445002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255780969 + 749664400 = 35437^2 + 27380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005445369 - 2²⁴ = 1988668153 is a prime.

It is a super-2 number, since 2×2005445369² = 8043622256087092322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2005445363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002722684 + 1002722685.

It is an arithmetic number, because the mean of its divisors is an integer number (1002722685).

Almost surely, 2^2005445369 is an apocalyptic number.

It is an amenable number.

2005445369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005445369 is an equidigital number, since it uses as much as digits as its factorization.

2005445369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2005445369 is about 44782.1992425562. The cubic root of 2005445369 is about 1261.0634695432.

The spelling of 2005445369 in words is "two billion, five million, four hundred forty-five thousand, three hundred sixty-nine".