197331097 has 2 divisors, whose sum is σ = 197331098. Its totient is φ = 197331096.

The previous prime is 197331091. The next prime is 197331107. The reversal of 197331097 is 790133791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109327936 + 88003161 = 10456^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 197331097 - 2¹¹ = 197329049 is a prime.

It is not a weakly prime, because it can be changed into another prime (197331091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98665548 + 98665549.

It is an arithmetic number, because the mean of its divisors is an integer number (98665549).

Almost surely, 2^197331097 is an apocalyptic number.

It is an amenable number.

197331097 is a deficient number, since it is larger than the sum of its proper divisors (1).

197331097 is an equidigital number, since it uses as much as digits as its factorization.

197331097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 197331097 is about 14047.4587381490. The cubic root of 197331097 is about 582.1905834591.

The spelling of 197331097 in words is "one hundred ninety-seven million, three hundred thirty-one thousand, ninety-seven".