197845853 has 2 divisors, whose sum is σ = 197845854. Its totient is φ = 197845852.

The previous prime is 197845829. The next prime is 197845861. The reversal of 197845853 is 358548791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158432569 + 39413284 = 12587^2 + 6278^2 .

It is a cyclic number.

It is not a de Polignac number, because 197845853 - 2¹⁸ = 197583709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197848853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98922926 + 98922927.

It is an arithmetic number, because the mean of its divisors is an integer number (98922927).

Almost surely, 2^197845853 is an apocalyptic number.

It is an amenable number.

197845853 is a deficient number, since it is larger than the sum of its proper divisors (1).

197845853 is an equidigital number, since it uses as much as digits as its factorization.

197845853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 197845853 is about 14065.7688378560. The cubic root of 197845853 is about 582.6963761622.

The spelling of 197845853 in words is "one hundred ninety-seven million, eight hundred forty-five thousand, eight hundred fifty-three".