6978813 has 8 divisors (see below), whose sum is σ = 9605376. Its totient is φ = 4502400.

The previous prime is 6978809. The next prime is 6978841. The reversal of 6978813 is 3188796.

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

It is not a de Polignac number, because 6978813 - 2² = 6978809 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37428 + ... + 37613.

It is an arithmetic number, because the mean of its divisors is an integer number (1200672).

Almost surely, 2^6978813 is an apocalyptic number.

It is an amenable number.

6978813 is a deficient number, since it is larger than the sum of its proper divisors (2626563).

6978813 is a wasteful number, since it uses less digits than its factorization.

6978813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75075.

The product of its digits is 72576, while the sum is 42.

The square root of 6978813 is about 2641.7443101103. The cubic root of 6978813 is about 191.0999266961.

The spelling of 6978813 in words is "six million, nine hundred seventy-eight thousand, eight hundred thirteen".