198214285891 has 2 divisors, whose sum is σ = 198214285892. Its totient is φ = 198214285890.

The previous prime is 198214285879. The next prime is 198214285901. The reversal of 198214285891 is 198582412891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198214285891 - 2¹³ = 198214277699 is a prime.

It is a super-3 number, since 3×198214285891³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (198214285811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99107142945 + 99107142946.

It is an arithmetic number, because the mean of its divisors is an integer number (99107142946).

Almost surely, 2^198214285891 is an apocalyptic number.

198214285891 is a deficient number, since it is larger than the sum of its proper divisors (1).

198214285891 is an equidigital number, since it uses as much as digits as its factorization.

198214285891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 58.

The spelling of 198214285891 in words is "one hundred ninety-eight billion, two hundred fourteen million, two hundred eighty-five thousand, eight hundred ninety-one".