197916847 has 2 divisors, whose sum is σ = 197916848. Its totient is φ = 197916846.

The previous prime is 197916841. The next prime is 197916871. The reversal of 197916847 is 748619791.

It is a weak prime.

It is an emirp because it is prime and its reverse (748619791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197916847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197916794 and 197916803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197916841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98958423 + 98958424.

It is an arithmetic number, because the mean of its divisors is an integer number (98958424).

Almost surely, 2^197916847 is an apocalyptic number.

197916847 is a deficient number, since it is larger than the sum of its proper divisors (1).

197916847 is an equidigital number, since it uses as much as digits as its factorization.

197916847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 197916847 is about 14068.2922559918. The cubic root of 197916847 is about 582.7660650956.

The spelling of 197916847 in words is "one hundred ninety-seven million, nine hundred sixteen thousand, eight hundred forty-seven".