85556117 has 2 divisors, whose sum is σ = 85556118. Its totient is φ = 85556116.

The previous prime is 85556101. The next prime is 85556123. The reversal of 85556117 is 71165558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65431921 + 20124196 = 8089^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 85556117 - 2⁴ = 85556101 is a prime.

It is a super-2 number, since 2×85556117² = 14639698312235378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85556417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778058 + 42778059.

It is an arithmetic number, because the mean of its divisors is an integer number (42778059).

Almost surely, 2^85556117 is an apocalyptic number.

It is an amenable number.

85556117 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556117 is an equidigital number, since it uses as much as digits as its factorization.

85556117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 38.

The square root of 85556117 is about 9249.6549665379. The cubic root of 85556117 is about 440.6397666329.

The spelling of 85556117 in words is "eighty-five million, five hundred fifty-six thousand, one hundred seventeen".