197635121 has 2 divisors, whose sum is σ = 197635122. Its totient is φ = 197635120.

The previous prime is 197635111. The next prime is 197635127. The reversal of 197635121 is 121536791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183982096 + 13653025 = 13564^2 + 3695^2 .

It is a cyclic number.

It is not a de Polignac number, because 197635121 - 2⁶ = 197635057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197635127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98817560 + 98817561.

It is an arithmetic number, because the mean of its divisors is an integer number (98817561).

Almost surely, 2^197635121 is an apocalyptic number.

It is an amenable number.

197635121 is a deficient number, since it is larger than the sum of its proper divisors (1).

197635121 is an equidigital number, since it uses as much as digits as its factorization.

197635121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 197635121 is about 14058.2758900229. The cubic root of 197635121 is about 582.4894197640.

The spelling of 197635121 in words is "one hundred ninety-seven million, six hundred thirty-five thousand, one hundred twenty-one".