868855447 has 4 divisors (see below), whose sum is σ = 885249000. Its totient is φ = 852461896.

The previous prime is 868855441. The next prime is 868855511. The reversal of 868855447 is 744558868.

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 868855447 - 2⁷ = 868855319 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 (868855441) 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, 8196697 + ... + 8196802.

It is an arithmetic number, because the mean of its divisors is an integer number (221312250).

Almost surely, 2^868855447 is an apocalyptic number.

868855447 is a deficient number, since it is larger than the sum of its proper divisors (16393553).

868855447 is a wasteful number, since it uses less digits than its factorization.

868855447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16393552.

The product of its digits is 8601600, while the sum is 55.

The square root of 868855447 is about 29476.3540316641. The cubic root of 868855447 is about 954.2214525889.

The spelling of 868855447 in words is "eight hundred sixty-eight million, eight hundred fifty-five thousand, four hundred forty-seven".