197908243 has 16 divisors (see below), whose sum is σ = 218211840. Its totient is φ = 178373664.

The previous prime is 197908241. The next prime is 197908259. The reversal of 197908243 is 342809791.

It is a cyclic number.

It is not a de Polignac number, because 197908243 - 2¹ = 197908241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197908243.

It is not an unprimeable number, because it can be changed into a prime (197908241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124230 + ... + 125812.

It is an arithmetic number, because the mean of its divisors is an integer number (13638240).

Almost surely, 2^197908243 is an apocalyptic number.

197908243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

197908243 is a deficient number, since it is larger than the sum of its proper divisors (20303597).

197908243 is a wasteful number, since it uses less digits than its factorization.

197908243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 197908243 is about 14067.9864586230. The cubic root of 197908243 is about 582.7576201485.

The spelling of 197908243 in words is "one hundred ninety-seven million, nine hundred eight thousand, two hundred forty-three".