864531329 has 2 divisors, whose sum is σ = 864531330. Its totient is φ = 864531328.

The previous prime is 864531251. The next prime is 864531361. The reversal of 864531329 is 923135468.

864531329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816644929 + 47886400 = 28577^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 864531329 - 2¹² = 864527233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (864531229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432265664 + 432265665.

It is an arithmetic number, because the mean of its divisors is an integer number (432265665).

Almost surely, 2^864531329 is an apocalyptic number.

It is an amenable number.

864531329 is a deficient number, since it is larger than the sum of its proper divisors (1).

864531329 is an equidigital number, since it uses as much as digits as its factorization.

864531329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 864531329 is about 29402.9136141301. The cubic root of 864531329 is about 952.6358301113.

The spelling of 864531329 in words is "eight hundred sixty-four million, five hundred thirty-one thousand, three hundred twenty-nine".