85198111 has 2 divisors, whose sum is σ = 85198112. Its totient is φ = 85198110.

The previous prime is 85198097. The next prime is 85198121. The reversal of 85198111 is 11189158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85198111 - 2⁹ = 85197599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85198121) 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, 42599055 + 42599056.

It is an arithmetic number, because the mean of its divisors is an integer number (42599056).

Almost surely, 2^85198111 is an apocalyptic number.

85198111 is a deficient number, since it is larger than the sum of its proper divisors (1).

85198111 is an equidigital number, since it uses as much as digits as its factorization.

85198111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 34.

The square root of 85198111 is about 9230.2822817073. The cubic root of 85198111 is about 440.0242944575.

The spelling of 85198111 in words is "eighty-five million, one hundred ninety-eight thousand, one hundred eleven".