6729861 has 4 divisors (see below), whose sum is σ = 8973152. Its totient is φ = 4486572.

The previous prime is 6729847. The next prime is 6729871. The reversal of 6729861 is 1689276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6729861 - 2⁵ = 6729829 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6729871) 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, 1121641 + ... + 1121646.

It is an arithmetic number, because the mean of its divisors is an integer number (2243288).

Almost surely, 2^6729861 is an apocalyptic number.

It is an amenable number.

6729861 is a deficient number, since it is larger than the sum of its proper divisors (2243291).

6729861 is a wasteful number, since it uses less digits than its factorization.

6729861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243290.

The product of its digits is 36288, while the sum is 39.

The square root of 6729861 is about 2594.1975637950. The cubic root of 6729861 is about 188.8000180294.

The spelling of 6729861 in words is "six million, seven hundred twenty-nine thousand, eight hundred sixty-one".