197555243 has 2 divisors, whose sum is σ = 197555244. Its totient is φ = 197555242.

The previous prime is 197555213. The next prime is 197555269. The reversal of 197555243 is 342555791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197555243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197555243.

It is not a weakly prime, because it can be changed into another prime (197555213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98777621 + 98777622.

It is an arithmetic number, because the mean of its divisors is an integer number (98777622).

Almost surely, 2^197555243 is an apocalyptic number.

197555243 is a deficient number, since it is larger than the sum of its proper divisors (1).

197555243 is an equidigital number, since it uses as much as digits as its factorization.

197555243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 41.

The square root of 197555243 is about 14055.4346428704. The cubic root of 197555243 is about 582.4109344566.

The spelling of 197555243 in words is "one hundred ninety-seven million, five hundred fifty-five thousand, two hundred forty-three".