1130987191 has 2 divisors, whose sum is σ = 1130987192. Its totient is φ = 1130987190.

The previous prime is 1130987189. The next prime is 1130987233. The reversal of 1130987191 is 1917890311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1130987191 - 2¹ = 1130987189 is a prime.

Together with 1130987189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1130987491) 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, 565493595 + 565493596.

It is an arithmetic number, because the mean of its divisors is an integer number (565493596).

Almost surely, 2^1130987191 is an apocalyptic number.

1130987191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1130987191 is an equidigital number, since it uses as much as digits as its factorization.

1130987191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 40.

The square root of 1130987191 is about 33630.1530029228. The cubic root of 1130987191 is about 1041.8836643120.

The spelling of 1130987191 in words is "one billion, one hundred thirty million, nine hundred eighty-seven thousand, one hundred ninety-one".