1972847 has 2 divisors, whose sum is σ = 1972848. Its totient is φ = 1972846.

The previous prime is 1972829. The next prime is 1972849. The reversal of 1972847 is 7482791.

It is a strong prime.

It is an emirp because it is prime and its reverse (7482791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1972847 - 2⁸ = 1972591 is a prime.

Together with 1972849, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1972847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972849) 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, 986423 + 986424.

It is an arithmetic number, because the mean of its divisors is an integer number (986424).

2^1972847 is an apocalyptic number.

1972847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972847 is an equidigital number, since it uses as much as digits as its factorization.

1972847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 1972847 is about 1404.5807203575. The cubic root of 1972847 is about 125.4193277410.

The spelling of 1972847 in words is "one million, nine hundred seventy-two thousand, eight hundred forty-seven".