729783649 has 8 divisors (see below), whose sum is σ = 834444800. Its totient is φ = 625224096.

The previous prime is 729783619. The next prime is 729783689. The reversal of 729783649 is 946387927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 729783649 - 2²⁹ = 192912737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 729783649.

It is not an unprimeable number, because it can be changed into a prime (729783619) 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 in 7 ways as a sum of consecutive naturals, for example, 9324 + ... + 39325.

It is an arithmetic number, because the mean of its divisors is an integer number (104305600).

Almost surely, 2^729783649 is an apocalyptic number.

It is an amenable number.

729783649 is a deficient number, since it is larger than the sum of its proper divisors (104661151).

729783649 is a wasteful number, since it uses less digits than its factorization.

729783649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50799.

The product of its digits is 4572288, while the sum is 55.

The square root of 729783649 is about 27014.5081206377. The cubic root of 729783649 is about 900.3223738145.

It can be divided in two parts, 729 and 783649, that added together give a triangular number (784378 = T₁₂₅₂).

The spelling of 729783649 in words is "seven hundred twenty-nine million, seven hundred eighty-three thousand, six hundred forty-nine".