197393197 has 2 divisors, whose sum is σ = 197393198. Its totient is φ = 197393196.

The previous prime is 197393167. The next prime is 197393201. The reversal of 197393197 is 791393791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135629316 + 61763881 = 11646^2 + 7859^2 .

It is an emirp because it is prime and its reverse (791393791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197393197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197393197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197393167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98696598 + 98696599.

It is an arithmetic number, because the mean of its divisors is an integer number (98696599).

Almost surely, 2^197393197 is an apocalyptic number.

It is an amenable number.

197393197 is a deficient number, since it is larger than the sum of its proper divisors (1).

197393197 is an equidigital number, since it uses as much as digits as its factorization.

197393197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 321489, while the sum is 49.

The square root of 197393197 is about 14049.6689284837. The cubic root of 197393197 is about 582.2516487514.

The spelling of 197393197 in words is "one hundred ninety-seven million, three hundred ninety-three thousand, one hundred ninety-seven".