7971347 has 2 divisors, whose sum is σ = 7971348. Its totient is φ = 7971346.

The previous prime is 7971331. The next prime is 7971373. The reversal of 7971347 is 7431797.

It is a weak prime.

It is an emirp because it is prime and its reverse (7431797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7971347 - 2⁴ = 7971331 is a prime.

It is a Chen prime.

It is equal to p₅₃₇₉₇₇ and since 7971347 and 537977 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7971347.

It is not a weakly prime, because it can be changed into another prime (7971307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985673 + 3985674.

It is an arithmetic number, because the mean of its divisors is an integer number (3985674).

Almost surely, 2^7971347 is an apocalyptic number.

7971347 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971347 is an equidigital number, since it uses as much as digits as its factorization.

7971347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 38.

The square root of 7971347 is about 2823.3573985594. The cubic root of 7971347 is about 199.7609393639.

The spelling of 7971347 in words is "seven million, nine hundred seventy-one thousand, three hundred forty-seven".