197097382791 has 6 divisors (see below), whose sum is σ = 284696219600. Its totient is φ = 131398255188.

The previous prime is 197097382777. The next prime is 197097382793. The reversal of 197097382791 is 197283790791.

It is a happy number.

197097382791 is a `hidden beast` number, since 19 + 70 + 97 + 382 + 7 + 91 = 666.

It is not a de Polignac number, because 197097382791 - 2¹⁴ = 197097366407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197097382793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10949854591 + ... + 10949854608.

Almost surely, 2^197097382791 is an apocalyptic number.

197097382791 is a deficient number, since it is larger than the sum of its proper divisors (87598836809).

197097382791 is a wasteful number, since it uses less digits than its factorization.

197097382791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21899709205 (or 21899709202 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 63.

The spelling of 197097382791 in words is "one hundred ninety-seven billion, ninety-seven million, three hundred eighty-two thousand, seven hundred ninety-one".