85127129 has 2 divisors, whose sum is σ = 85127130. Its totient is φ = 85127128.

The previous prime is 85127123. The next prime is 85127149. The reversal of 85127129 is 92172158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58553104 + 26574025 = 7652^2 + 5155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85127129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85127123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42563564 + 42563565.

It is an arithmetic number, because the mean of its divisors is an integer number (42563565).

Almost surely, 2^85127129 is an apocalyptic number.

It is an amenable number.

85127129 is a deficient number, since it is larger than the sum of its proper divisors (1).

85127129 is an equidigital number, since it uses as much as digits as its factorization.

85127129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 85127129 is about 9226.4364193333. The cubic root of 85127129 is about 439.9020598126.

The spelling of 85127129 in words is "eighty-five million, one hundred twenty-seven thousand, one hundred twenty-nine".