197707609129 has 2 divisors, whose sum is σ = 197707609130. Its totient is φ = 197707609128.

The previous prime is 197707609109. The next prime is 197707609147. The reversal of 197707609129 is 921906707791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197693169129 + 14440000 = 444627^2 + 3800^2 .

It is an emirp because it is prime and its reverse (921906707791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197707609129 is a prime.

It is not a weakly prime, because it can be changed into another prime (197707609109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98853804564 + 98853804565.

It is an arithmetic number, because the mean of its divisors is an integer number (98853804565).

Almost surely, 2^197707609129 is an apocalyptic number.

It is an amenable number.

197707609129 is a deficient number, since it is larger than the sum of its proper divisors (1).

197707609129 is an equidigital number, since it uses as much as digits as its factorization.

197707609129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000564, while the sum is 58.

The spelling of 197707609129 in words is "one hundred ninety-seven billion, seven hundred seven million, six hundred nine thousand, one hundred twenty-nine".