197121065 has 16 divisors (see below), whose sum is σ = 241963200. Its totient is φ = 154116672.

The previous prime is 197121059. The next prime is 197121079. The reversal of 197121065 is 560121791.

It is a cyclic number.

It is not a de Polignac number, because 197121065 - 2⁴ = 197121049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50939 + ... + 54671.

It is an arithmetic number, because the mean of its divisors is an integer number (15122700).

Almost surely, 2^197121065 is an apocalyptic number.

It is an amenable number.

197121065 is a deficient number, since it is larger than the sum of its proper divisors (44842135).

197121065 is a wasteful number, since it uses less digits than its factorization.

197121065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 197121065 is about 14039.9809472805. The cubic root of 197121065 is about 581.9839560139.

The spelling of 197121065 in words is "one hundred ninety-seven million, one hundred twenty-one thousand, sixty-five".