729434423 has 4 divisors (see below), whose sum is σ = 736656648. Its totient is φ = 722212200.

The previous prime is 729434399. The next prime is 729434437. The reversal of 729434423 is 324434927.

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

It is a cyclic number.

It is not a de Polignac number, because 729434423 - 2⁶ = 729434359 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 (729434473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3610961 + ... + 3611162.

It is an arithmetic number, because the mean of its divisors is an integer number (184164162).

Almost surely, 2^729434423 is an apocalyptic number.

729434423 is a deficient number, since it is larger than the sum of its proper divisors (7222225).

729434423 is a wasteful number, since it uses less digits than its factorization.

729434423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7222224.

The product of its digits is 145152, while the sum is 38.

The square root of 729434423 is about 27008.0436722100. The cubic root of 729434423 is about 900.1787393972.

The spelling of 729434423 in words is "seven hundred twenty-nine million, four hundred thirty-four thousand, four hundred twenty-three".