198122423 has 2 divisors, whose sum is σ = 198122424. Its totient is φ = 198122422.

The previous prime is 198122401. The next prime is 198122467. The reversal of 198122423 is 324221891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198122423 - 2⁸ = 198122167 is a prime.

It is a super-3 number, since 3×198122423³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198122423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198122473) 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, 99061211 + 99061212.

It is an arithmetic number, because the mean of its divisors is an integer number (99061212).

Almost surely, 2^198122423 is an apocalyptic number.

198122423 is a deficient number, since it is larger than the sum of its proper divisors (1).

198122423 is an equidigital number, since it uses as much as digits as its factorization.

198122423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 198122423 is about 14075.5967191448. The cubic root of 198122423 is about 582.9677680880.

The spelling of 198122423 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, four hundred twenty-three".