6729891 has 8 divisors (see below), whose sum is σ = 10255104. Its totient is φ = 3845640.

The previous prime is 6729871. The next prime is 6729901. The reversal of 6729891 is 1989276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6729891 - 2¹⁴ = 6713507 is a prime.

6729891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6729871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160215 + ... + 160256.

It is an arithmetic number, because the mean of its divisors is an integer number (1281888).

Almost surely, 2^6729891 is an apocalyptic number.

6729891 is a deficient number, since it is larger than the sum of its proper divisors (3525213).

6729891 is a wasteful number, since it uses less digits than its factorization.

6729891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320481.

The product of its digits is 54432, while the sum is 42.

The square root of 6729891 is about 2594.2033459234. The cubic root of 6729891 is about 188.8002985697.

The spelling of 6729891 in words is "six million, seven hundred twenty-nine thousand, eight hundred ninety-one".