864869 has 8 divisors (see below), whose sum is σ = 932352. Its totient is φ = 799920.

The previous prime is 864817. The next prime is 864883. The reversal of 864869 is 968468.

864869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864869 - 2⁸ = 864613 is a prime.

It is a super-2 number, since 2×864869² = 1495996774322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107 + ... + 1319.

It is an arithmetic number, because the mean of its divisors is an integer number (116544).

2⁸⁶⁴⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

864869 is a deficient number, since it is larger than the sum of its proper divisors (67483).

864869 is a wasteful number, since it uses less digits than its factorization.

864869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 82944, while the sum is 41.

The square root of 864869 is about 929.9833331840. The cubic root of 864869 is about 95.2759841666.

The spelling of 864869 in words is "eight hundred sixty-four thousand, eight hundred sixty-nine".