869321 has 2 divisors, whose sum is σ = 869322. Its totient is φ = 869320.

The previous prime is 869317. The next prime is 869339. The reversal of 869321 is 123968.

869321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 211600 = 811^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 869321 - 2² = 869317 is a prime.

It is a super-4 number, since 4×869321⁴ (a number of 25 digits) contains 4444 as substring.

It is a plaindrome in base 13 and base 15.

It is not a weakly prime, because it can be changed into another prime (869371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434660 + 434661.

It is an arithmetic number, because the mean of its divisors is an integer number (434661).

2⁸⁶⁹³²¹ is an apocalyptic number.

It is an amenable number.

869321 is a deficient number, since it is larger than the sum of its proper divisors (1).

869321 is an equidigital number, since it uses as much as digits as its factorization.

869321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 869321 is about 932.3738520572. The cubic root of 869321 is about 95.4391853523.

The spelling of 869321 in words is "eight hundred sixty-nine thousand, three hundred twenty-one".