1161043187 has 2 divisors, whose sum is σ = 1161043188. Its totient is φ = 1161043186.

The previous prime is 1161043157. The next prime is 1161043189. The reversal of 1161043187 is 7813401611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161043187 - 2²⁶ = 1093934323 is a prime.

Together with 1161043189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1161043189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580521593 + 580521594.

It is an arithmetic number, because the mean of its divisors is an integer number (580521594).

Almost surely, 2^1161043187 is an apocalyptic number.

1161043187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161043187 is an equidigital number, since it uses as much as digits as its factorization.

1161043187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1161043187 is about 34074.0838027965. The cubic root of 1161043187 is about 1051.0324499314.

Adding to 1161043187 its reverse (7813401611), we get a palindrome (8974444798).

The spelling of 1161043187 in words is "one billion, one hundred sixty-one million, forty-three thousand, one hundred eighty-seven".