868393 has 4 divisors (see below), whose sum is σ = 876928. Its totient is φ = 859860.

The previous prime is 868381. The next prime is 868397. The reversal of 868393 is 393868.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868393 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (868397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113 + ... + 4318.

It is an arithmetic number, because the mean of its divisors is an integer number (219232).

2⁸⁶⁸³⁹³ is an apocalyptic number.

It is an amenable number.

868393 is a deficient number, since it is larger than the sum of its proper divisors (8535).

868393 is a wasteful number, since it uses less digits than its factorization.

868393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8534.

The product of its digits is 31104, while the sum is 37.

The square root of 868393 is about 931.8760647211. The cubic root of 868393 is about 95.4052128235.

The spelling of 868393 in words is "eight hundred sixty-eight thousand, three hundred ninety-three".