85436847 has 6 divisors (see below), whose sum is σ = 123408792. Its totient is φ = 56957892.

The previous prime is 85436843. The next prime is 85436861. The reversal of 85436847 is 74863458.

85436847 is a `hidden beast` number, since 8 + 543 + 68 + 47 = 666.

It is not a de Polignac number, because 85436847 - 2² = 85436843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85436843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4746483 + ... + 4746500.

It is an arithmetic number, because the mean of its divisors is an integer number (20568132).

Almost surely, 2^85436847 is an apocalyptic number.

85436847 is a deficient number, since it is larger than the sum of its proper divisors (37971945).

85436847 is a wasteful number, since it uses less digits than its factorization.

85436847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9492989 (or 9492986 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 85436847 is about 9243.2054504917. The cubic root of 85436847 is about 440.4349126052.

The spelling of 85436847 in words is "eighty-five million, four hundred thirty-six thousand, eight hundred forty-seven".