6975729 has 24 divisors (see below), whose sum is σ = 10782720. Its totient is φ = 4330368.

The previous prime is 6975719. The next prime is 6975743. The reversal of 6975729 is 9275796.

6975729 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6975729 - 2⁵ = 6975697 is a prime.

It is a super-3 number, since 3×6975729³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

6975729 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6975719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19252 + ... + 19610.

It is an arithmetic number, because the mean of its divisors is an integer number (449280).

Almost surely, 2^6975729 is an apocalyptic number.

It is an amenable number.

6975729 is a deficient number, since it is larger than the sum of its proper divisors (3806991).

6975729 is a wasteful number, since it uses less digits than its factorization.

6975729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 506 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 6975729 is about 2641.1605403686. The cubic root of 6975729 is about 191.0717729585.

The spelling of 6975729 in words is "six million, nine hundred seventy-five thousand, seven hundred twenty-nine".