197144538 has 8 divisors (see below), whose sum is σ = 394289088. Its totient is φ = 65714844.

The previous prime is 197144509. The next prime is 197144539. The reversal of 197144538 is 835441791.

It is a happy number.

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

197144538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 197144538.

It is not an unprimeable number, because it can be changed into a prime (197144539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16428706 + ... + 16428717.

It is an arithmetic number, because the mean of its divisors is an integer number (49286136).

Almost surely, 2^197144538 is an apocalyptic number.

197144538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

197144538 is a wasteful number, since it uses less digits than its factorization.

197144538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32857428.

The product of its digits is 120960, while the sum is 42.

The square root of 197144538 is about 14040.8168565792. The cubic root of 197144538 is about 582.0070558066.

The spelling of 197144538 in words is "one hundred ninety-seven million, one hundred forty-four thousand, five hundred thirty-eight".