85865447 has 4 divisors (see below), whose sum is σ = 87041760. Its totient is φ = 84689136.

The previous prime is 85865431. The next prime is 85865477. The reversal of 85865447 is 74456858.

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

It is a cyclic number.

It is not a de Polignac number, because 85865447 - 2⁴ = 85865431 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 (85865407) 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, 588047 + ... + 588192.

It is an arithmetic number, because the mean of its divisors is an integer number (21760440).

Almost surely, 2^85865447 is an apocalyptic number.

85865447 is a deficient number, since it is larger than the sum of its proper divisors (1176313).

85865447 is a wasteful number, since it uses less digits than its factorization.

85865447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176312.

The product of its digits is 1075200, while the sum is 47.

The square root of 85865447 is about 9266.3610441208. The cubic root of 85865447 is about 441.1701754609.

The spelling of 85865447 in words is "eighty-five million, eight hundred sixty-five thousand, four hundred forty-seven".