197137644 has 96 divisors (see below), whose sum is σ = 540691200. Its totient is φ = 55234560.

The previous prime is 197137643. The next prime is 197137691. The reversal of 197137644 is 446731791.

197137644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 197137596 and 197137605.

It is not an unprimeable number, because it can be changed into a prime (197137643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131652 + ... + 133140.

It is an arithmetic number, because the mean of its divisors is an integer number (5632200).

Almost surely, 2^197137644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197137644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270345600).

197137644 is an abundant number, since it is smaller than the sum of its proper divisors (343553556).

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

197137644 is a wasteful number, since it uses less digits than its factorization.

197137644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1581 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 197137644 is about 14040.5713558957. The cubic root of 197137644 is about 582.0002716074. Note that the first 3 decimals are identical.

The spelling of 197137644 in words is "one hundred ninety-seven million, one hundred thirty-seven thousand, six hundred forty-four".