868853 has 4 divisors (see below), whose sum is σ = 919980. Its totient is φ = 817728.

The previous prime is 868849. The next prime is 868867. The reversal of 868853 is 358868.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 770884 + 97969 = 878^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 868853 - 2² = 868849 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25538 + ... + 25571.

It is an arithmetic number, because the mean of its divisors is an integer number (229995).

2⁸⁶⁸⁸⁵³ is an apocalyptic number.

It is an amenable number.

868853 is a deficient number, since it is larger than the sum of its proper divisors (51127).

868853 is a wasteful number, since it uses less digits than its factorization.

868853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51126.

The product of its digits is 46080, while the sum is 38.

The square root of 868853 is about 932.1228459812. The cubic root of 868853 is about 95.4220556781.

The spelling of 868853 in words is "eight hundred sixty-eight thousand, eight hundred fifty-three".