197655061 has 2 divisors, whose sum is σ = 197655062. Its totient is φ = 197655060.

The previous prime is 197655037. The next prime is 197655083. The reversal of 197655061 is 160556791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192682161 + 4972900 = 13881^2 + 2230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197655061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197655361) 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, 98827530 + 98827531.

It is an arithmetic number, because the mean of its divisors is an integer number (98827531).

Almost surely, 2^197655061 is an apocalyptic number.

It is an amenable number.

197655061 is a deficient number, since it is larger than the sum of its proper divisors (1).

197655061 is an equidigital number, since it uses as much as digits as its factorization.

197655061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 197655061 is about 14058.9850629411. The cubic root of 197655061 is about 582.5090088066.

The spelling of 197655061 in words is "one hundred ninety-seven million, six hundred fifty-five thousand, sixty-one".