729997 has 8 divisors (see below), whose sum is σ = 806976. Its totient is φ = 656832.

The previous prime is 729991. The next prime is 730003. The reversal of 729997 is 799927.

729997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (729991) and next prime (730003).

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

It is a cyclic number.

It is not a de Polignac number, because 729997 - 2¹¹ = 727949 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 (729991) 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, 543 + ... + 1324.

It is an arithmetic number, because the mean of its divisors is an integer number (100872).

2⁷²⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

729997 is a deficient number, since it is larger than the sum of its proper divisors (76979).

729997 is a wasteful number, since it uses less digits than its factorization.

729997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907.

The product of its digits is 71442, while the sum is 43.

The square root of 729997 is about 854.3986189127. The cubic root of 729997 is about 90.0410101167.

It can be divided in two parts, 7299 and 97, that added together give a square (7396 = 86²).

The spelling of 729997 in words is "seven hundred twenty-nine thousand, nine hundred ninety-seven".