85134971 has 2 divisors, whose sum is σ = 85134972. Its totient is φ = 85134970.

The previous prime is 85134949. The next prime is 85135007. The reversal of 85134971 is 17943158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85134971 - 2¹⁰ = 85133947 is a prime.

It is not a weakly prime, because it can be changed into another prime (85134911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42567485 + 42567486.

It is an arithmetic number, because the mean of its divisors is an integer number (42567486).

Almost surely, 2^85134971 is an apocalyptic number.

85134971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85134971 is an equidigital number, since it uses as much as digits as its factorization.

85134971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 85134971 is about 9226.8613840244. The cubic root of 85134971 is about 439.9155674768.

The spelling of 85134971 in words is "eighty-five million, one hundred thirty-four thousand, nine hundred seventy-one".