2003987191 has 2 divisors, whose sum is σ = 2003987192. Its totient is φ = 2003987190.

The previous prime is 2003987177. The next prime is 2003987207. The reversal of 2003987191 is 1917893002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2003987191 - 2⁵ = 2003987159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003987291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001993595 + 1001993596.

It is an arithmetic number, because the mean of its divisors is an integer number (1001993596).

Almost surely, 2^2003987191 is an apocalyptic number.

2003987191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003987191 is an equidigital number, since it uses as much as digits as its factorization.

2003987191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 2003987191 is about 44765.9155049911. The cubic root of 2003987191 is about 1260.7577517711.

The spelling of 2003987191 in words is "two billion, three million, nine hundred eighty-seven thousand, one hundred ninety-one".