198011 has 8 divisors (see below), whose sum is σ = 221184. Its totient is φ = 175720.

The previous prime is 197971. The next prime is 198013. The reversal of 198011 is 110891.

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 198011 - 2⁶ = 197947 is a prime.

It is a super-2 number, since 2×198011² = 78416712242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (27648).

2¹⁹⁸⁰¹¹ is an apocalyptic number.

198011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198011 is a deficient number, since it is larger than the sum of its proper divisors (23173).

198011 is a wasteful number, since it uses less digits than its factorization.

198011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 198011 is about 444.9842693849. The cubic root of 198011 is about 58.2858461601.

It can be divided in two parts, 1980 and 11, that added together give a palindrome (1991).

The spelling of 198011 in words is "one hundred ninety-eight thousand, eleven".