6729729 has 8 divisors (see below), whose sum is σ = 9003072. Its totient is φ = 4471440.

The previous prime is 6729727. The next prime is 6729787. The reversal of 6729729 is 9279276.

6729729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6729729 - 2¹ = 6729727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6729721) 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, 2674 + ... + 4539.

It is an arithmetic number, because the mean of its divisors is an integer number (1125384).

It is a Proth number, since it is equal to 1643 ⋅ 2¹² + 1 and 1643 < 2¹².

Almost surely, 2^6729729 is an apocalyptic number.

It is an amenable number.

6729729 is a deficient number, since it is larger than the sum of its proper divisors (2273343).

6729729 is a wasteful number, since it uses less digits than its factorization.

6729729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527.

The product of its digits is 95256, while the sum is 42.

The square root of 6729729 is about 2594.1721222772. The cubic root of 6729729 is about 188.7987836421.

It can be divided in two parts, 672 and 9729, that added together give a palindrome (10401).

The spelling of 6729729 in words is "six million, seven hundred twenty-nine thousand, seven hundred twenty-nine".