197211664 has 20 divisors (see below), whose sum is σ = 411490156. Its totient is φ = 91020672.

The previous prime is 197211649. The next prime is 197211673. The reversal of 197211664 is 466112791.

It can be written as a sum of positive squares in 2 ways, for example, as 76387600 + 120824064 = 8740^2 + 10992^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 473859 + ... + 474274.

Almost surely, 2^197211664 is an apocalyptic number.

It is an amenable number.

197211664 is an abundant number, since it is smaller than the sum of its proper divisors (214278492).

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

197211664 is a wasteful number, since it uses less digits than its factorization.

197211664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948154 (or 948148 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 197211664 is about 14043.2070411285. The cubic root of 197211664 is about 582.0731044238.

The spelling of 197211664 in words is "one hundred ninety-seven million, two hundred eleven thousand, six hundred sixty-four".