6723978 has 8 divisors (see below), whose sum is σ = 13447968. Its totient is φ = 2241324.

The previous prime is 6723971. The next prime is 6723979. The reversal of 6723978 is 8793276.

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

6723978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6723971) 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 3 ways as a sum of consecutive naturals, for example, 560326 + ... + 560337.

It is an arithmetic number, because the mean of its divisors is an integer number (1680996).

Almost surely, 2^6723978 is an apocalyptic number.

6723978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6723978 is a wasteful number, since it uses less digits than its factorization.

6723978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120668.

The product of its digits is 127008, while the sum is 42.

The square root of 6723978 is about 2593.0634392548. The cubic root of 6723978 is about 188.7449879522.

The spelling of 6723978 in words is "six million, seven hundred twenty-three thousand, nine hundred seventy-eight".