197161146 has 144 divisors (see below), whose sum is σ = 542640384. Its totient is φ = 50633856.

The previous prime is 197161141. The next prime is 197161163. The reversal of 197161146 is 641161791.

It is a self number, because there is not a number n which added to its sum of digits gives 197161146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197161141) 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 71 ways as a sum of consecutive naturals, for example, 1000720 + ... + 1000916.

It is an arithmetic number, because the mean of its divisors is an integer number (3768336).

Almost surely, 2^197161146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197161146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271320192).

197161146 is an abundant number, since it is smaller than the sum of its proper divisors (345479238).

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

197161146 is a wasteful number, since it uses less digits than its factorization.

197161146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 269 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 197161146 is about 14041.4082627064. The cubic root of 197161146 is about 582.0233986412.

The spelling of 197161146 in words is "one hundred ninety-seven million, one hundred sixty-one thousand, one hundred forty-six".