85134187 has 2 divisors, whose sum is σ = 85134188. Its totient is φ = 85134186.

The previous prime is 85134173. The next prime is 85134197. The reversal of 85134187 is 78143158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85134187 is a prime.

It is not a weakly prime, because it can be changed into another prime (85134167) 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, 42567093 + 42567094.

It is an arithmetic number, because the mean of its divisors is an integer number (42567094).

Almost surely, 2^85134187 is an apocalyptic number.

85134187 is a deficient number, since it is larger than the sum of its proper divisors (1).

85134187 is an equidigital number, since it uses as much as digits as its factorization.

85134187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 85134187 is about 9226.8188992740. The cubic root of 85134187 is about 439.9142170922.

The spelling of 85134187 in words is "eighty-five million, one hundred thirty-four thousand, one hundred eighty-seven".