85706247 has 16 divisors (see below), whose sum is σ = 127018368. Its totient is φ = 50962080.

The previous prime is 85706221. The next prime is 85706249. The reversal of 85706247 is 74260758.

It is not a de Polignac number, because 85706247 - 2²² = 81511943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85706249) 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 15 ways as a sum of consecutive naturals, for example, 22753 + ... + 26250.

It is an arithmetic number, because the mean of its divisors is an integer number (7938648).

Almost surely, 2^85706247 is an apocalyptic number.

85706247 is a deficient number, since it is larger than the sum of its proper divisors (41312121).

85706247 is a wasteful number, since it uses less digits than its factorization.

85706247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49070.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 85706247 is about 9257.7668473558. The cubic root of 85706247 is about 440.8973542604.

The spelling of 85706247 in words is "eighty-five million, seven hundred six thousand, two hundred forty-seven".