868407 has 4 divisors (see below), whose sum is σ = 1157880. Its totient is φ = 578936.

The previous prime is 868397. The next prime is 868409. The reversal of 868407 is 704868.

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 868407 - 2⁸ = 868151 is a prime.

It is a D-number.

868407 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868409) 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, 144732 + ... + 144737.

It is an arithmetic number, because the mean of its divisors is an integer number (289470).

2⁸⁶⁸⁴⁰⁷ is an apocalyptic number.

868407 is a deficient number, since it is larger than the sum of its proper divisors (289473).

868407 is a wasteful number, since it uses less digits than its factorization.

868407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289472.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 868407 is about 931.8835764193. The cubic root of 868407 is about 95.4057255199.

It can be divided in two parts, 868 and 407, that added together give a triangular number (1275 = T₅₀).

The spelling of 868407 in words is "eight hundred sixty-eight thousand, four hundred seven".