198542347 has 2 divisors, whose sum is σ = 198542348. Its totient is φ = 198542346.

The previous prime is 198542327. The next prime is 198542363. The reversal of 198542347 is 743245891.

It is a strong prime.

It is an emirp because it is prime and its reverse (743245891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198542347 - 2¹⁵ = 198509579 is a prime.

It is not a weakly prime, because it can be changed into another prime (198542317) 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 as a sum of consecutive naturals, namely, 99271173 + 99271174.

It is an arithmetic number, because the mean of its divisors is an integer number (99271174).

Almost surely, 2^198542347 is an apocalyptic number.

198542347 is a deficient number, since it is larger than the sum of its proper divisors (1).

198542347 is an equidigital number, since it uses as much as digits as its factorization.

198542347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 198542347 is about 14090.5055622572. The cubic root of 198542347 is about 583.3793476265.

It can be divided in two parts, 19854 and 2347, that added together give a square (22201 = 149²).

The spelling of 198542347 in words is "one hundred ninety-eight million, five hundred forty-two thousand, three hundred forty-seven".