198400543 has 8 divisors (see below), whose sum is σ = 218142720. Its totient is φ = 178942680.

The previous prime is 198400537. The next prime is 198400597. The reversal of 198400543 is 345004891.

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 198400543 - 2²¹ = 196303391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198400499 and 198400508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198404543) 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, 69613 + ... + 72406.

It is an arithmetic number, because the mean of its divisors is an integer number (27267840).

Almost surely, 2^198400543 is an apocalyptic number.

198400543 is a deficient number, since it is larger than the sum of its proper divisors (19742177).

198400543 is a wasteful number, since it uses less digits than its factorization.

198400543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142157.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 198400543 is about 14085.4727645188. The cubic root of 198400543 is about 583.2404264190.

The spelling of 198400543 in words is "one hundred ninety-eight million, four hundred thousand, five hundred forty-three".