6978243 has 4 divisors (see below), whose sum is σ = 9304328. Its totient is φ = 4652160.

The previous prime is 6978227. The next prime is 6978247. The reversal of 6978243 is 3428796.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6978243 - 2⁴ = 6978227 is a prime.

It is a d-powerful number, because it can be written as 6³ + 9² + 7⁸ + 8⁵ + 2¹⁷ + 4¹⁰ + 3⁶ .

It is a D-number.

It is a Duffinian number.

6978243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6978247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163038 + ... + 1163043.

It is an arithmetic number, because the mean of its divisors is an integer number (2326082).

Almost surely, 2^6978243 is an apocalyptic number.

6978243 is a deficient number, since it is larger than the sum of its proper divisors (2326085).

6978243 is a wasteful number, since it uses less digits than its factorization.

6978243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326084.

The product of its digits is 72576, while the sum is 39.

The square root of 6978243 is about 2641.6364246429. The cubic root of 6978243 is about 191.0947238092.

The spelling of 6978243 in words is "six million, nine hundred seventy-eight thousand, two hundred forty-three".