6697729 has 4 divisors (see below), whose sum is σ = 6703060. Its totient is φ = 6692400.

The previous prime is 6697727. The next prime is 6697741. The reversal of 6697729 is 9277966.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 2096704 = 2145^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 6697729 - 2¹ = 6697727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6697721) 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, 379 + ... + 3679.

It is an arithmetic number, because the mean of its divisors is an integer number (1675765).

Almost surely, 2^6697729 is an apocalyptic number.

It is an amenable number.

6697729 is a deficient number, since it is larger than the sum of its proper divisors (5331).

6697729 is a wasteful number, since it uses less digits than its factorization.

6697729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330.

The product of its digits is 285768, while the sum is 46.

The square root of 6697729 is about 2587.9971020077. The cubic root of 6697729 is about 188.4990607078.

The spelling of 6697729 in words is "six million, six hundred ninety-seven thousand, seven hundred twenty-nine".