864331 has 8 divisors (see below), whose sum is σ = 985824. Its totient is φ = 750720.

The previous prime is 864323. The next prime is 864341. The reversal of 864331 is 133468.

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

It is not a de Polignac number, because 864331 - 2³ = 864323 is a prime.

It is a super-2 number, since 2×864331² = 1494136155122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 864296 and 864305.

It is not an unprimeable number, because it can be changed into a prime (864301) 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, 1735 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (123228).

2⁸⁶⁴³³¹ is an apocalyptic number.

864331 is a deficient number, since it is larger than the sum of its proper divisors (121493).

864331 is a wasteful number, since it uses less digits than its factorization.

864331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941.

The product of its digits is 1728, while the sum is 25.

The square root of 864331 is about 929.6940356913. The cubic root of 864331 is about 95.2562242909.

Adding to 864331 its reverse (133468), we get a palindrome (997799).

The spelling of 864331 in words is "eight hundred sixty-four thousand, three hundred thirty-one".