867869 has 4 divisors (see below), whose sum is σ = 888096. Its totient is φ = 847644.

The previous prime is 867857. The next prime is 867871. The reversal of 867869 is 968768.

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-867869 is a prime.

It is a super-2 number, since 2×867869² = 1506393202322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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 (867829) 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, 10049 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (222024).

2⁸⁶⁷⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

867869 is a deficient number, since it is larger than the sum of its proper divisors (20227).

867869 is a wasteful number, since it uses less digits than its factorization.

867869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20226.

The product of its digits is 145152, while the sum is 44.

The square root of 867869 is about 931.5948690284. The cubic root of 867869 is about 95.3860193669.

The spelling of 867869 in words is "eight hundred sixty-seven thousand, eight hundred sixty-nine".