85571069 has 2 divisors, whose sum is σ = 85571070. Its totient is φ = 85571068.

The previous prime is 85571029. The next prime is 85571071. The reversal of 85571069 is 96017558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62884900 + 22686169 = 7930^2 + 4763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85571069 is a prime.

It is a super-2 number, since 2×85571069² = 14644815699605522, which contains 22 as substring.

Together with 85571071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85571029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42785534 + 42785535.

It is an arithmetic number, because the mean of its divisors is an integer number (42785535).

Almost surely, 2^85571069 is an apocalyptic number.

It is an amenable number.

85571069 is a deficient number, since it is larger than the sum of its proper divisors (1).

85571069 is an equidigital number, since it uses as much as digits as its factorization.

85571069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 85571069 is about 9250.4631775928. The cubic root of 85571069 is about 440.6654342385.

The spelling of 85571069 in words is "eighty-five million, five hundred seventy-one thousand, sixty-nine".