85122971 has 2 divisors, whose sum is σ = 85122972. Its totient is φ = 85122970.

The previous prime is 85122953. The next prime is 85122991. The reversal of 85122971 is 17922158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85122971 - 2²² = 80928667 is a prime.

It is not a weakly prime, because it can be changed into another prime (85122911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42561485 + 42561486.

It is an arithmetic number, because the mean of its divisors is an integer number (42561486).

Almost surely, 2^85122971 is an apocalyptic number.

85122971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85122971 is an equidigital number, since it uses as much as digits as its factorization.

85122971 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 85122971 is about 9226.2110858142. The cubic root of 85122971 is about 439.8948974169.

The spelling of 85122971 in words is "eighty-five million, one hundred twenty-two thousand, nine hundred seventy-one".