197818497 has 16 divisors (see below), whose sum is σ = 295807680. Its totient is φ = 130644576.

The previous prime is 197818493. The next prime is 197818507. The reversal of 197818497 is 794818791.

It is not a de Polignac number, because 197818497 - 2² = 197818493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197818493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31348 + ... + 37125.

It is an arithmetic number, because the mean of its divisors is an integer number (18487980).

Almost surely, 2^197818497 is an apocalyptic number.

It is an amenable number.

197818497 is a deficient number, since it is larger than the sum of its proper divisors (97989183).

197818497 is a wasteful number, since it uses less digits than its factorization.

197818497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68589 (or 68583 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The square root of 197818497 is about 14064.7963725039. The cubic root of 197818497 is about 582.6695185917.

The spelling of 197818497 in words is "one hundred ninety-seven million, eight hundred eighteen thousand, four hundred ninety-seven".