85117197 has 32 divisors (see below), whose sum is σ = 127232640. Its totient is φ = 50181120.

The previous prime is 85117187. The next prime is 85117223. The reversal of 85117197 is 79171158.

It is not a de Polignac number, because 85117197 - 2⁷ = 85117069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85117177) 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 in 31 ways as a sum of consecutive naturals, for example, 214203 + ... + 214599.

It is an arithmetic number, because the mean of its divisors is an integer number (3976020).

Almost surely, 2^85117197 is an apocalyptic number.

It is an amenable number.

85117197 is a deficient number, since it is larger than the sum of its proper divisors (42115443).

85117197 is a wasteful number, since it uses less digits than its factorization.

85117197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its digits is 17640, while the sum is 39.

The square root of 85117197 is about 9225.8981676583. The cubic root of 85117197 is about 439.8849509808.

The spelling of 85117197 in words is "eighty-five million, one hundred seventeen thousand, one hundred ninety-seven".