729489361 has 2 divisors, whose sum is σ = 729489362. Its totient is φ = 729489360.

The previous prime is 729489359. The next prime is 729489379. The reversal of 729489361 is 163984927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727650625 + 1838736 = 26975^2 + 1356^2 .

It is a cyclic number.

It is not a de Polignac number, because 729489361 - 2¹ = 729489359 is a prime.

Together with 729489359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (729489661) 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, 364744680 + 364744681.

It is an arithmetic number, because the mean of its divisors is an integer number (364744681).

Almost surely, 2^729489361 is an apocalyptic number.

It is an amenable number.

729489361 is a deficient number, since it is larger than the sum of its proper divisors (1).

729489361 is an equidigital number, since it uses as much as digits as its factorization.

729489361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 729489361 is about 27009.0607204323. The cubic root of 729489361 is about 900.2013380831.

The spelling of 729489361 in words is "seven hundred twenty-nine million, four hundred eighty-nine thousand, three hundred sixty-one".