198868549 has 8 divisors (see below), whose sum is σ = 217734048. Its totient is φ = 180134160.

The previous prime is 198868547. The next prime is 198868591. The reversal of 198868549 is 945868891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198868549 - 2¹ = 198868547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198868493 and 198868502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198868541) 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 7 ways as a sum of consecutive naturals, for example, 29587 + ... + 35680.

It is an arithmetic number, because the mean of its divisors is an integer number (27216756).

Almost surely, 2^198868549 is an apocalyptic number.

It is an amenable number.

198868549 is a deficient number, since it is larger than the sum of its proper divisors (18865499).

198868549 is a wasteful number, since it uses less digits than its factorization.

198868549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65555.

The product of its digits is 4976640, while the sum is 58.

The square root of 198868549 is about 14102.0760528370. The cubic root of 198868549 is about 583.6986672211.

The spelling of 198868549 in words is "one hundred ninety-eight million, eight hundred sixty-eight thousand, five hundred forty-nine".