198180043 has 4 divisors (see below), whose sum is σ = 198536400. Its totient is φ = 197823688.

The previous prime is 198180041. The next prime is 198180097. The reversal of 198180043 is 340081891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198180043 - 2¹ = 198180041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198179990 and 198180008.

It is not an unprimeable number, because it can be changed into a prime (198180041) 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, 177343 + ... + 178456.

It is an arithmetic number, because the mean of its divisors is an integer number (49634100).

Almost surely, 2^198180043 is an apocalyptic number.

198180043 is a deficient number, since it is larger than the sum of its proper divisors (356357).

198180043 is an equidigital number, since it uses as much as digits as its factorization.

198180043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356356.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 198180043 is about 14077.6433752244. The cubic root of 198180043 is about 583.0242775035.

The spelling of 198180043 in words is "one hundred ninety-eight million, one hundred eighty thousand, forty-three".