729967 has 4 divisors (see below), whose sum is σ = 834256. Its totient is φ = 625680.

The previous prime is 729947. The next prime is 729977. The reversal of 729967 is 769927.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729967 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 (729907) 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, 52134 + ... + 52147.

It is an arithmetic number, because the mean of its divisors is an integer number (208564).

2⁷²⁹⁹⁶⁷ is an apocalyptic number.

729967 is a deficient number, since it is larger than the sum of its proper divisors (104289).

729967 is a wasteful number, since it uses less digits than its factorization.

729967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104288.

The product of its digits is 47628, while the sum is 40.

The square root of 729967 is about 854.3810625242. The cubic root of 729967 is about 90.0397766563.

Subtracting from 729967 its sum of digits (40), we obtain a palindrome (729927).

The spelling of 729967 in words is "seven hundred twenty-nine thousand, nine hundred sixty-seven".