197621868 has 12 divisors (see below), whose sum is σ = 461117720. Its totient is φ = 65873952.

The previous prime is 197621867. The next prime is 197621873. The reversal of 197621868 is 868126791.

197621868 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (197621861) 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, 8234233 + ... + 8234256.

Almost surely, 2^197621868 is an apocalyptic number.

It is an amenable number.

197621868 is an abundant number, since it is smaller than the sum of its proper divisors (263495852).

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

197621868 is a wasteful number, since it uses less digits than its factorization.

197621868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16468496 (or 16468494 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 197621868 is about 14057.8045227553. The cubic root of 197621868 is about 582.4763992968.

The spelling of 197621868 in words is "one hundred ninety-seven million, six hundred twenty-one thousand, eight hundred sixty-eight".