864897 has 8 divisors (see below), whose sum is σ = 1258080. Its totient is φ = 524160.

The previous prime is 864887. The next prime is 864901. The reversal of 864897 is 798468.

It is a happy number.

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

It is not a de Polignac number, because 864897 - 2⁸ = 864641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864817) 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, 13072 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (157260).

2⁸⁶⁴⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

864897 is a deficient number, since it is larger than the sum of its proper divisors (393183).

864897 is a wasteful number, since it uses less digits than its factorization.

864897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26223.

The product of its digits is 96768, while the sum is 42.

The square root of 864897 is about 929.9983870954. The cubic root of 864897 is about 95.2770123372.

The spelling of 864897 in words is "eight hundred sixty-four thousand, eight hundred ninety-seven".