197555497 has 2 divisors, whose sum is σ = 197555498. Its totient is φ = 197555496.

The previous prime is 197555473. The next prime is 197555503. The reversal of 197555497 is 794555791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194769936 + 2785561 = 13956^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 197555497 - 2¹⁹ = 197031209 is a prime.

It is not a weakly prime, because it can be changed into another prime (197555417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98777748 + 98777749.

It is an arithmetic number, because the mean of its divisors is an integer number (98777749).

Almost surely, 2^197555497 is an apocalyptic number.

It is an amenable number.

197555497 is a deficient number, since it is larger than the sum of its proper divisors (1).

197555497 is an equidigital number, since it uses as much as digits as its factorization.

197555497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1984500, while the sum is 52.

The square root of 197555497 is about 14055.4436785183. The cubic root of 197555497 is about 582.4111840615.

It can be divided in two parts, 19755 and 5497, that added together give a palindrome (25252).

The spelling of 197555497 in words is "one hundred ninety-seven million, five hundred fifty-five thousand, four hundred ninety-seven".