2005189387 has 2 divisors, whose sum is σ = 2005189388. Its totient is φ = 2005189386.

The previous prime is 2005189363. The next prime is 2005189391. The reversal of 2005189387 is 7839815002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005189387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2005189327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002594693 + 1002594694.

It is an arithmetic number, because the mean of its divisors is an integer number (1002594694).

Almost surely, 2^2005189387 is an apocalyptic number.

2005189387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005189387 is an equidigital number, since it uses as much as digits as its factorization.

2005189387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 2005189387 is about 44779.3410737586. The cubic root of 2005189387 is about 1261.0098117556.

The spelling of 2005189387 in words is "two billion, five million, one hundred eighty-nine thousand, three hundred eighty-seven".