197196138 has 12 divisors (see below), whose sum is σ = 427258338. Its totient is φ = 65732040.

The previous prime is 197196133. The next prime is 197196149. The reversal of 197196138 is 831691791.

197196138 is a `hidden beast` number, since 19 + 7 + 19 + 613 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 195524289 + 1671849 = 13983^2 + 1293^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197196093 and 197196102.

It is not an unprimeable number, because it can be changed into a prime (197196133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5477653 + ... + 5477688.

Almost surely, 2^197196138 is an apocalyptic number.

197196138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

197196138 is an abundant number, since it is smaller than the sum of its proper divisors (230062200).

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

197196138 is a wasteful number, since it uses less digits than its factorization.

197196138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955349 (or 10955346 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 197196138 is about 14042.6542362902. The cubic root of 197196138 is about 582.0578289511.

The spelling of 197196138 in words is "one hundred ninety-seven million, one hundred ninety-six thousand, one hundred thirty-eight".