6978313 has 4 divisors (see below), whose sum is σ = 7388820. Its totient is φ = 6567808.

The previous prime is 6978287. The next prime is 6978319. The reversal of 6978313 is 3138796.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4507129 + 2471184 = 2123^2 + 1572^2 .

It is a cyclic number.

It is not a de Polignac number, because 6978313 - 2⁵ = 6978281 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6978319) 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, 205228 + ... + 205261.

It is an arithmetic number, because the mean of its divisors is an integer number (1847205).

Almost surely, 2^6978313 is an apocalyptic number.

It is an amenable number.

6978313 is a deficient number, since it is larger than the sum of its proper divisors (410507).

6978313 is a wasteful number, since it uses less digits than its factorization.

6978313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410506.

The product of its digits is 27216, while the sum is 37.

The square root of 6978313 is about 2641.6496739727. The cubic root of 6978313 is about 191.0953627755.

It can be divided in two parts, 69783 and 13, that added together give a palindrome (69796).

The spelling of 6978313 in words is "six million, nine hundred seventy-eight thousand, three hundred thirteen".