85286891 has 2 divisors, whose sum is σ = 85286892. Its totient is φ = 85286890.

The previous prime is 85286879. The next prime is 85286897. The reversal of 85286891 is 19868258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85286891 - 2⁶ = 85286827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (85286897) 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, 42643445 + 42643446.

It is an arithmetic number, because the mean of its divisors is an integer number (42643446).

Almost surely, 2^85286891 is an apocalyptic number.

85286891 is a deficient number, since it is larger than the sum of its proper divisors (1).

85286891 is an equidigital number, since it uses as much as digits as its factorization.

85286891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The square root of 85286891 is about 9235.0901998844. The cubic root of 85286891 is about 440.1770826473.

The spelling of 85286891 in words is "eighty-five million, two hundred eighty-six thousand, eight hundred ninety-one".