729613397 has 4 divisors (see below), whose sum is σ = 749332716. Its totient is φ = 709894080.

The previous prime is 729613373. The next prime is 729613403. The reversal of 729613397 is 793316927.

It is a happy number.

729613397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 492884401 + 236728996 = 22201^2 + 15386^2 .

It is a cyclic number.

It is not a de Polignac number, because 729613397 - 2¹⁴ = 729597013 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 (729613097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9859604 + ... + 9859677.

It is an arithmetic number, because the mean of its divisors is an integer number (187333179).

Almost surely, 2^729613397 is an apocalyptic number.

It is an amenable number.

729613397 is a deficient number, since it is larger than the sum of its proper divisors (19719319).

729613397 is a wasteful number, since it uses less digits than its factorization.

729613397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19719318.

The product of its digits is 428652, while the sum is 47.

The square root of 729613397 is about 27011.3568152361. The cubic root of 729613397 is about 900.2523559829.

The spelling of 729613397 in words is "seven hundred twenty-nine million, six hundred thirteen thousand, three hundred ninety-seven".