729520243 has 8 divisors (see below), whose sum is σ = 740282976. Its totient is φ = 718771200.

The previous prime is 729520237. The next prime is 729520247. The reversal of 729520243 is 342025927.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729520243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729520199 and 729520208.

It is not an unprimeable number, because it can be changed into a prime (729520247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160563 + ... + 165043.

It is an arithmetic number, because the mean of its divisors is an integer number (92535372).

Almost surely, 2^729520243 is an apocalyptic number.

729520243 is a deficient number, since it is larger than the sum of its proper divisors (10762733).

729520243 is a wasteful number, since it uses less digits than its factorization.

729520243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 729520243 is about 27009.6324114194. The cubic root of 729520243 is about 900.2140408616.

The spelling of 729520243 in words is "seven hundred twenty-nine million, five hundred twenty thousand, two hundred forty-three".