85847217 has 4 divisors (see below), whose sum is σ = 114462960. Its totient is φ = 57231476.

The previous prime is 85847213. The next prime is 85847233. The reversal of 85847217 is 71274858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85847217 - 2² = 85847213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85847213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14307867 + ... + 14307872.

It is an arithmetic number, because the mean of its divisors is an integer number (28615740).

Almost surely, 2^85847217 is an apocalyptic number.

It is an amenable number.

85847217 is a deficient number, since it is larger than the sum of its proper divisors (28615743).

85847217 is a wasteful number, since it uses less digits than its factorization.

85847217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28615742.

The product of its digits is 125440, while the sum is 42.

The square root of 85847217 is about 9265.3773263694. The cubic root of 85847217 is about 441.1389517971.

The spelling of 85847217 in words is "eighty-five million, eight hundred forty-seven thousand, two hundred seventeen".