198124439 has 2 divisors, whose sum is σ = 198124440. Its totient is φ = 198124438.

The previous prime is 198124417. The next prime is 198124447. The reversal of 198124439 is 934421891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198124439 - 2²⁰ = 197075863 is a prime.

It is a super-3 number, since 3×198124439³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198124396 and 198124405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198124469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99062219 + 99062220.

It is an arithmetic number, because the mean of its divisors is an integer number (99062220).

Almost surely, 2^198124439 is an apocalyptic number.

198124439 is a deficient number, since it is larger than the sum of its proper divisors (1).

198124439 is an equidigital number, since it uses as much as digits as its factorization.

198124439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 198124439 is about 14075.6683322676. The cubic root of 198124439 is about 582.9697454160.

The spelling of 198124439 in words is "one hundred ninety-eight million, one hundred twenty-four thousand, four hundred thirty-nine".