198154943 has 16 divisors (see below), whose sum is σ = 233209344. Its totient is φ = 164812320.

The previous prime is 198154939. The next prime is 198154949. The reversal of 198154943 is 349451891.

It is a cyclic number.

It is not a de Polignac number, because 198154943 - 2² = 198154939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198154894 and 198154903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198154949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125348 + ... + 126918.

It is an arithmetic number, because the mean of its divisors is an integer number (14575584).

Almost surely, 2^198154943 is an apocalyptic number.

198154943 is a deficient number, since it is larger than the sum of its proper divisors (35054401).

198154943 is a wasteful number, since it uses less digits than its factorization.

198154943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its digits is 155520, while the sum is 44.

The square root of 198154943 is about 14076.7518625569. The cubic root of 198154943 is about 582.9996626348. Note that the first 3 decimals are identical.

The spelling of 198154943 in words is "one hundred ninety-eight million, one hundred fifty-four thousand, nine hundred forty-three".