729689813 has 8 divisors (see below), whose sum is σ = 773623200. Its totient is φ = 686309328.

The previous prime is 729689809. The next prime is 729689819. The reversal of 729689813 is 318986927.

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

It is a cyclic number.

It is not a de Polignac number, because 729689813 - 2² = 729689809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729689819) 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, 135506 + ... + 140787.

It is an arithmetic number, because the mean of its divisors is an integer number (96702900).

Almost surely, 2^729689813 is an apocalyptic number.

It is an amenable number.

729689813 is a deficient number, since it is larger than the sum of its proper divisors (43933387).

729689813 is a wasteful number, since it uses less digits than its factorization.

729689813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276451.

The product of its digits is 1306368, while the sum is 53.

The square root of 729689813 is about 27012.7712943341. The cubic root of 729689813 is about 900.2837841715.

The spelling of 729689813 in words is "seven hundred twenty-nine million, six hundred eighty-nine thousand, eight hundred thirteen".