729431109 has 32 divisors (see below), whose sum is σ = 1240934400. Its totient is φ = 418808880.

The previous prime is 729431099. The next prime is 729431149. The reversal of 729431109 is 901134927.

It is not a de Polignac number, because 729431109 - 2⁴ = 729431093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729431149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58989 + ... + 70274.

It is an arithmetic number, because the mean of its divisors is an integer number (38779200).

Almost surely, 2^729431109 is an apocalyptic number.

It is an amenable number.

729431109 is a deficient number, since it is larger than the sum of its proper divisors (511503291).

729431109 is a wasteful number, since it uses less digits than its factorization.

729431109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129302 (or 129296 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 729431109 is about 27007.9823200475. The cubic root of 729431109 is about 900.1773761507.

The spelling of 729431109 in words is "seven hundred twenty-nine million, four hundred thirty-one thousand, one hundred nine".