864069 has 4 divisors (see below), whose sum is σ = 1152096. Its totient is φ = 576044.

The previous prime is 864053. The next prime is 864077. The reversal of 864069 is 960468.

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 not a de Polignac number, because 864069 - 2⁴ = 864053 is a prime.

It is a super-2 number, since 2×864069² = 1493230473522, which contains 22 as substring.

It is a D-number.

864069 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864069.

It is not an unprimeable number, because it can be changed into a prime (864029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144009 + ... + 144014.

It is an arithmetic number, because the mean of its divisors is an integer number (288024).

2⁸⁶⁴⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

864069 is a deficient number, since it is larger than the sum of its proper divisors (288027).

864069 is a wasteful number, since it uses less digits than its factorization.

864069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288026.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 864069 is about 929.5531184392. The cubic root of 864069 is about 95.2465984828.

The spelling of 864069 in words is "eight hundred sixty-four thousand, sixty-nine".