197120556 has 18 divisors (see below), whose sum is σ = 498277052. Its totient is φ = 65706840.

The previous prime is 197120551. The next prime is 197120597. The reversal of 197120556 is 655021791.

197120556 is a `hidden beast` number, since 1 + 97 + 12 + 0 + 556 = 666.

197120556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5475571 = 197120556 / (1 + 9 + 7 + 1 + 2 + 0 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 197120556.

It is not an unprimeable number, because it can be changed into a prime (197120551) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2737750 + ... + 2737821.

Almost surely, 2^197120556 is an apocalyptic number.

It is an amenable number.

197120556 is an abundant number, since it is smaller than the sum of its proper divisors (301156496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197120556 is a wasteful number, since it uses less digits than its factorization.

197120556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475581 (or 5475576 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 197120556 is about 14039.9628204636. The cubic root of 197120556 is about 581.9834550864.

The spelling of 197120556 in words is "one hundred ninety-seven million, one hundred twenty thousand, five hundred fifty-six".