198216949 has 8 divisors (see below), whose sum is σ = 238456640. Its totient is φ = 160958016.

The previous prime is 198216947. The next prime is 198217009. The reversal of 198216949 is 949612891.

It is a happy number.

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 198216949 - 2¹ = 198216947 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 (198216947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745044 + ... + 745309.

It is an arithmetic number, because the mean of its divisors is an integer number (29807080).

Almost surely, 2^198216949 is an apocalyptic number.

198216949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198216949 is a deficient number, since it is larger than the sum of its proper divisors (40239691).

198216949 is a wasteful number, since it uses less digits than its factorization.

198216949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490379.

The product of its digits is 279936, while the sum is 49.

The square root of 198216949 is about 14078.9541159846. The cubic root of 198216949 is about 583.0604664122.

The spelling of 198216949 in words is "one hundred ninety-eight million, two hundred sixteen thousand, nine hundred forty-nine".