85906871 has 2 divisors, whose sum is σ = 85906872. Its totient is φ = 85906870.

The previous prime is 85906823. The next prime is 85906883. The reversal of 85906871 is 17860958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85906871 - 2²² = 81712567 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85906801) 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, 42953435 + 42953436.

It is an arithmetic number, because the mean of its divisors is an integer number (42953436).

Almost surely, 2^85906871 is an apocalyptic number.

85906871 is a deficient number, since it is larger than the sum of its proper divisors (1).

85906871 is an equidigital number, since it uses as much as digits as its factorization.

85906871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 85906871 is about 9268.5959562385. The cubic root of 85906871 is about 441.2411085155.

The spelling of 85906871 in words is "eighty-five million, nine hundred six thousand, eight hundred seventy-one".