197755989 has 8 divisors (see below), whose sum is σ = 266008512. Its totient is φ = 130670400.

The previous prime is 197755979. The next prime is 197755991. The reversal of 197755989 is 989557791.

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

It is not a de Polignac number, because 197755989 - 2⁴ = 197755973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197755939) 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, 291337 + ... + 292014.

It is an arithmetic number, because the mean of its divisors is an integer number (33251064).

Almost surely, 2^197755989 is an apocalyptic number.

It is an amenable number.

197755989 is a deficient number, since it is larger than the sum of its proper divisors (68252523).

197755989 is a wasteful number, since it uses less digits than its factorization.

197755989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583467.

The product of its digits is 7144200, while the sum is 60.

The square root of 197755989 is about 14062.5740531384. The cubic root of 197755989 is about 582.6081402007.

The spelling of 197755989 in words is "one hundred ninety-seven million, seven hundred fifty-five thousand, nine hundred eighty-nine".