198383891 has 2 divisors, whose sum is σ = 198383892. Its totient is φ = 198383890.

The previous prime is 198383881. The next prime is 198383893.

198383891 is nontrivially palindromic in base 10.

198383891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 198383891 - 2⁶ = 198383827 is a prime.

Together with 198383893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198383893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99191945 + 99191946.

It is an arithmetic number, because the mean of its divisors is an integer number (99191946).

Almost surely, 2^198383891 is an apocalyptic number.

198383891 is a deficient number, since it is larger than the sum of its proper divisors (1).

198383891 is an equidigital number, since it uses as much as digits as its factorization.

198383891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 198383891 is about 14084.8816466451. The cubic root of 198383891 is about 583.2241086019.

The spelling of 198383891 in words is "one hundred ninety-eight million, three hundred eighty-three thousand, eight hundred ninety-one".