198949 has 8 divisors (see below), whose sum is σ = 215840. Its totient is φ = 182736.

The previous prime is 198943. The next prime is 198953. The reversal of 198949 is 949891.

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 198949 - 2³ = 198941 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (26980).

2¹⁹⁸⁹⁴⁹ is an apocalyptic number.

198949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198949 is a deficient number, since it is larger than the sum of its proper divisors (16891).

198949 is a wasteful number, since it uses less digits than its factorization.

198949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 23328, while the sum is 40.

The square root of 198949 is about 446.0369939814. The cubic root of 198949 is about 58.3777367131.

It can be divided in two parts, 1989 and 49, that multiplied together give a triangular number (97461 = T₄₄₁).

The spelling of 198949 in words is "one hundred ninety-eight thousand, nine hundred forty-nine".