729358009 has 4 divisors (see below), whose sum is σ = 729533520. Its totient is φ = 729182500.

The previous prime is 729357983. The next prime is 729358027. The reversal of 729358009 is 900853927.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 729358009 - 2⁵ = 729357977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729358039) 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, 81367 + ... + 89884.

It is an arithmetic number, because the mean of its divisors is an integer number (182383380).

Almost surely, 2^729358009 is an apocalyptic number.

It is an amenable number.

729358009 is a deficient number, since it is larger than the sum of its proper divisors (175511).

729358009 is a wasteful number, since it uses less digits than its factorization.

729358009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175510.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 729358009 is about 27006.6289825295. The cubic root of 729358009 is about 900.1473046956.

The spelling of 729358009 in words is "seven hundred twenty-nine million, three hundred fifty-eight thousand, nine".