85641187 has 2 divisors, whose sum is σ = 85641188. Its totient is φ = 85641186.

The previous prime is 85641161. The next prime is 85641197. The reversal of 85641187 is 78114658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85641187 - 2¹¹ = 85639139 is a prime.

It is not a weakly prime, because it can be changed into another prime (85641137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42820593 + 42820594.

It is an arithmetic number, because the mean of its divisors is an integer number (42820594).

Almost surely, 2^85641187 is an apocalyptic number.

85641187 is a deficient number, since it is larger than the sum of its proper divisors (1).

85641187 is an equidigital number, since it uses as much as digits as its factorization.

85641187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 85641187 is about 9254.2523739090. The cubic root of 85641187 is about 440.7857636270.

The spelling of 85641187 in words is "eighty-five million, six hundred forty-one thousand, one hundred eighty-seven".