197711121 has 8 divisors (see below), whose sum is σ = 263700864. Its totient is φ = 131764400.

The previous prime is 197711117. The next prime is 197711153. The reversal of 197711121 is 121117791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197711121 - 2² = 197711117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197711191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200 + ... + 20006.

It is an arithmetic number, because the mean of its divisors is an integer number (32962608).

Almost surely, 2^197711121 is an apocalyptic number.

It is an amenable number.

197711121 is a deficient number, since it is larger than the sum of its proper divisors (65989743).

197711121 is a wasteful number, since it uses less digits than its factorization.

197711121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21511.

The product of its digits is 882, while the sum is 30.

The square root of 197711121 is about 14060.9786643747. The cubic root of 197711121 is about 582.5640750553.

The spelling of 197711121 in words is "one hundred ninety-seven million, seven hundred eleven thousand, one hundred twenty-one".