729629 has 4 divisors (see below), whose sum is σ = 761376. Its totient is φ = 697884.

The previous prime is 729613. The next prime is 729637. The reversal of 729629 is 926927.

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, and also an emirpimes, since its reverse is a distinct semiprime: 926927 = 29 ⋅31963.

It is a cyclic number.

It is not a de Polignac number, because 729629 - 2⁴ = 729613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729649) 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, 15839 + ... + 15884.

It is an arithmetic number, because the mean of its divisors is an integer number (190344).

2⁷²⁹⁶²⁹ is an apocalyptic number.

It is an amenable number.

729629 is a deficient number, since it is larger than the sum of its proper divisors (31747).

729629 is a wasteful number, since it uses less digits than its factorization.

729629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31746.

The product of its digits is 13608, while the sum is 35.

The square root of 729629 is about 854.1832356117. The cubic root of 729629 is about 90.0258773325.

The spelling of 729629 in words is "seven hundred twenty-nine thousand, six hundred twenty-nine".