6978547 has 2 divisors, whose sum is σ = 6978548. Its totient is φ = 6978546.

The previous prime is 6978511. The next prime is 6978593. The reversal of 6978547 is 7458796.

It is a happy number.

It is an a-pointer prime, because the next prime (6978593) can be obtained adding 6978547 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6978547 - 2¹⁵ = 6945779 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6978497 and 6978506.

It is not a weakly prime, because it can be changed into another prime (6978047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489273 + 3489274.

It is an arithmetic number, because the mean of its divisors is an integer number (3489274).

Almost surely, 2^6978547 is an apocalyptic number.

6978547 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978547 is an equidigital number, since it uses as much as digits as its factorization.

6978547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 6978547 is about 2641.6939641071. The cubic root of 6978547 is about 191.0974987175.

Subtracting 6978547 from its reverse (7458796), we obtain a square (480249 = 693²).

The spelling of 6978547 in words is "six million, nine hundred seventy-eight thousand, five hundred forty-seven".