87116189 has 2 divisors, whose sum is σ = 87116190. Its totient is φ = 87116188.

The previous prime is 87116149. The next prime is 87116191. The reversal of 87116189 is 98161178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 5484964 = 9035^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 87116189 - 2⁸ = 87115933 is a prime.

Together with 87116191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87116119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43558094 + 43558095.

It is an arithmetic number, because the mean of its divisors is an integer number (43558095).

Almost surely, 2^87116189 is an apocalyptic number.

It is an amenable number.

87116189 is a deficient number, since it is larger than the sum of its proper divisors (1).

87116189 is an equidigital number, since it uses as much as digits as its factorization.

87116189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 41.

The square root of 87116189 is about 9333.6053591311. The cubic root of 87116189 is about 443.3019307410.

The spelling of 87116189 in words is "eighty-seven million, one hundred sixteen thousand, one hundred eighty-nine".