85985111 has 2 divisors, whose sum is σ = 85985112. Its totient is φ = 85985110.

The previous prime is 85985083. The next prime is 85985113. The reversal of 85985111 is 11158958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85985111 is a prime.

It is a Sophie Germain prime.

Together with 85985113, 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 (85985113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42992555 + 42992556.

It is an arithmetic number, because the mean of its divisors is an integer number (42992556).

Almost surely, 2^85985111 is an apocalyptic number.

85985111 is a deficient number, since it is larger than the sum of its proper divisors (1).

85985111 is an equidigital number, since it uses as much as digits as its factorization.

85985111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 38.

The square root of 85985111 is about 9272.8156996675. The cubic root of 85985111 is about 441.3750218594.

The spelling of 85985111 in words is "eighty-five million, nine hundred eighty-five thousand, one hundred eleven".