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198449 = 1911039
BaseRepresentation
bin110000011100110001
3101002012222
4300130301
522322244
64130425
71454366
oct603461
9332188
10198449
11126109
1296a15
136c434
145246d
153dbee
hex30731

198449 has 4 divisors (see below), whose sum is σ = 199680. Its totient is φ = 197220.

The previous prime is 198439. The next prime is 198461. The reversal of 198449 is 944891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944891 = 6531447.

It is a cyclic number.

It is not a de Polignac number, because 198449 - 28 = 198193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329 + ... + 710.

It is an arithmetic number, because the mean of its divisors is an integer number (49920).

2198449 is an apocalyptic number.

It is an amenable number.

198449 is a deficient number, since it is larger than the sum of its proper divisors (1231).

198449 is a wasteful number, since it uses less digits than its factorization.

198449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its digits is 10368, while the sum is 35.

The square root of 198449 is about 445.4761497544. The cubic root of 198449 is about 58.3287905759.

The spelling of 198449 in words is "one hundred ninety-eight thousand, four hundred forty-nine".

Divisors: 1 191 1039 198449