398219111 has 2 divisors, whose sum is σ = 398219112. Its totient is φ = 398219110.

The previous prime is 398219089. The next prime is 398219113. The reversal of 398219111 is 111912893.

It is a strong prime.

It is an emirp because it is prime and its reverse (111912893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398219111 is a prime.

Together with 398219113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398219113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199109555 + 199109556.

It is an arithmetic number, because the mean of its divisors is an integer number (199109556).

Almost surely, 2^398219111 is an apocalyptic number.

398219111 is a deficient number, since it is larger than the sum of its proper divisors (1).

398219111 is an equidigital number, since it uses as much as digits as its factorization.

398219111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 35.

The square root of 398219111 is about 19955.4281086626. The cubic root of 398219111 is about 735.7111977086.

The spelling of 398219111 in words is "three hundred ninety-eight million, two hundred nineteen thousand, one hundred eleven".