869530729 has 2 divisors, whose sum is σ = 869530730. Its totient is φ = 869530728.

The previous prime is 869530723. The next prime is 869530759. The reversal of 869530729 is 927035968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681210000 + 188320729 = 26100^2 + 13723^2 .

It is a cyclic number.

It is not a de Polignac number, because 869530729 - 2²¹ = 867433577 is a prime.

It is not a weakly prime, because it can be changed into another prime (869530723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434765364 + 434765365.

It is an arithmetic number, because the mean of its divisors is an integer number (434765365).

Almost surely, 2^869530729 is an apocalyptic number.

It is an amenable number.

869530729 is a deficient number, since it is larger than the sum of its proper divisors (1).

869530729 is an equidigital number, since it uses as much as digits as its factorization.

869530729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 869530729 is about 29487.8064460550. The cubic root of 869530729 is about 954.4685983056.

The spelling of 869530729 in words is "eight hundred sixty-nine million, five hundred thirty thousand, seven hundred twenty-nine".