6853729 has 4 divisors (see below), whose sum is σ = 6924484. Its totient is φ = 6782976.

The previous prime is 6853711. The next prime is 6853733. The reversal of 6853729 is 9273586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5071504 + 1782225 = 2252^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 6853729 - 2¹⁷ = 6722657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6853691 and 6853700.

It is not an unprimeable number, because it can be changed into a prime (6853709) 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, 35232 + ... + 35425.

It is an arithmetic number, because the mean of its divisors is an integer number (1731121).

Almost surely, 2^6853729 is an apocalyptic number.

It is an amenable number.

6853729 is a deficient number, since it is larger than the sum of its proper divisors (70755).

6853729 is an equidigital number, since it uses as much as digits as its factorization.

6853729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70754.

The product of its digits is 90720, while the sum is 40.

The square root of 6853729 is about 2617.9627575655. The cubic root of 6853729 is about 189.9513171672.

The spelling of 6853729 in words is "six million, eight hundred fifty-three thousand, seven hundred twenty-nine".