6978281 has 2 divisors, whose sum is σ = 6978282. Its totient is φ = 6978280.

The previous prime is 6978253. The next prime is 6978287. The reversal of 6978281 is 1828796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 648025 = 2516^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 6978281 - 2¹⁴ = 6961897 is a prime.

It is a super-2 number, since 2×6978281² = 97392811429922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6978287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489140 + 3489141.

It is an arithmetic number, because the mean of its divisors is an integer number (3489141).

Almost surely, 2^6978281 is an apocalyptic number.

It is an amenable number.

6978281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978281 is an equidigital number, since it uses as much as digits as its factorization.

6978281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 6978281 is about 2641.6436171444. The cubic root of 6978281 is about 191.0950706771.

The spelling of 6978281 in words is "six million, nine hundred seventy-eight thousand, two hundred eighty-one".