85291117 has 4 divisors (see below), whose sum is σ = 88232220. Its totient is φ = 82350016.

The previous prime is 85291109. The next prime is 85291121. The reversal of 85291117 is 71119258.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14243076 + 71048041 = 3774^2 + 8429^2 .

It is a cyclic number.

It is not a de Polignac number, because 85291117 - 2³ = 85291109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85291127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470508 + ... + 1470565.

It is an arithmetic number, because the mean of its divisors is an integer number (22058055).

Almost surely, 2^85291117 is an apocalyptic number.

It is an amenable number.

85291117 is a deficient number, since it is larger than the sum of its proper divisors (2941103).

85291117 is a wasteful number, since it uses less digits than its factorization.

85291117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941102.

The product of its digits is 5040, while the sum is 34.

The square root of 85291117 is about 9235.3189982805. The cubic root of 85291117 is about 440.1843528448.

The spelling of 85291117 in words is "eighty-five million, two hundred ninety-one thousand, one hundred seventeen".