6723729 has 10 divisors (see below), whose sum is σ = 10044210. Its totient is φ = 4482432.

The previous prime is 6723727. The next prime is 6723733. The reversal of 6723729 is 9273276.

It can be written as a sum of positive squares in only one way, i.e., 5992704 + 731025 = 2448^2 + 855^2 .

It is not a de Polignac number, because 6723729 - 2¹ = 6723727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6723693 and 6723702.

It is not an unprimeable number, because it can be changed into a prime (6723727) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41424 + ... + 41585.

It is an arithmetic number, because the mean of its divisors is an integer number (1004421).

Almost surely, 2^6723729 is an apocalyptic number.

It is an amenable number.

6723729 is a deficient number, since it is larger than the sum of its proper divisors (3320481).

6723729 is an equidigital number, since it uses as much as digits as its factorization.

6723729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83021 (or 83012 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 6723729 is about 2593.0154261014. The cubic root of 6723729 is about 188.7426580774.

The spelling of 6723729 in words is "six million, seven hundred twenty-three thousand, seven hundred twenty-nine".