197135689 has 8 divisors (see below), whose sum is σ = 211673088. Its totient is φ = 182925120.

The previous prime is 197135683. The next prime is 197135699. The reversal of 197135689 is 986531791.

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 197135689 - 2³ = 197135681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197135681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80457 + ... + 82870.

It is an arithmetic number, because the mean of its divisors is an integer number (26459136).

Almost surely, 2^197135689 is an apocalyptic number.

It is an amenable number.

197135689 is a deficient number, since it is larger than the sum of its proper divisors (14537399).

197135689 is a wasteful number, since it uses less digits than its factorization.

197135689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163415.

The product of its digits is 408240, while the sum is 49.

The square root of 197135689 is about 14040.5017360492. The cubic root of 197135689 is about 581.9983477160.

The spelling of 197135689 in words is "one hundred ninety-seven million, one hundred thirty-five thousand, six hundred eighty-nine".