6978437 has 2 divisors, whose sum is σ = 6978438. Its totient is φ = 6978436.

The previous prime is 6978431. The next prime is 6978451. The reversal of 6978437 is 7348796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5755201 + 1223236 = 2399^2 + 1106^2 .

It is a cyclic number.

It is not a de Polignac number, because 6978437 - 2⁴ = 6978421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6978431) 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 as a sum of consecutive naturals, namely, 3489218 + 3489219.

It is an arithmetic number, because the mean of its divisors is an integer number (3489219).

Almost surely, 2^6978437 is an apocalyptic number.

It is an amenable number.

6978437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978437 is an equidigital number, since it uses as much as digits as its factorization.

6978437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 6978437 is about 2641.6731440509. The cubic root of 6978437 is about 191.0964946481.

The spelling of 6978437 in words is "six million, nine hundred seventy-eight thousand, four hundred thirty-seven".