198954211 has 2 divisors, whose sum is σ = 198954212.
Its totient is φ = 198954210.
The previous prime is 198954199. The next prime is 198954227. The reversal of 198954211 is 112459891.
It is a weak prime.
It is an emirp because it is prime and its reverse (112459891) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 198954211 - 211 = 198952163 is a prime.
It is not a weakly prime, because it can be changed into another prime (198954251) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99477105 + 99477106.
It is an arithmetic number, because the mean of its divisors is an integer number (99477106).
Almost surely, 2198954211 is an apocalyptic number.
198954211 is the 7540-th centered heptagonal number.
198954211 is a deficient number, since it is larger than the sum of its proper divisors (1).
198954211 is an equidigital number, since it uses as much as digits as its factorization.
198954211 is an evil number, because the sum of its binary digits is even.
The product of its digits is 25920, while the sum is 40.
The square root of 198954211 is about 14105.1129382221.
The cubic root of 198954211 is about 583.7824639769.
The spelling of 198954211 in words is "one hundred ninety-eight million, nine hundred fifty-four thousand, two hundred eleven".