197665968 has 80 divisors (see below), whose sum is σ = 540778880. Its totient is φ = 62042112.

The previous prime is 197665967. The next prime is 197665981. The reversal of 197665968 is 869566791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (197665967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175455 + ... + 176577.

It is an arithmetic number, because the mean of its divisors is an integer number (6759736).

Almost surely, 2^197665968 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 197665968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270389440).

197665968 is an abundant number, since it is smaller than the sum of its proper divisors (343112912).

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

197665968 is a wasteful number, since it uses less digits than its factorization.

197665968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1340 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 57.

The square root of 197665968 is about 14059.3729589907. The cubic root of 197665968 is about 582.5197232787.

The spelling of 197665968 in words is "one hundred ninety-seven million, six hundred sixty-five thousand, nine hundred sixty-eight".