198658373 has 2 divisors, whose sum is σ = 198658374. Its totient is φ = 198658372.

The previous prime is 198658367. The next prime is 198658423. The reversal of 198658373 is 373856891.

It is a happy number.

It is an a-pointer prime, because the next prime (198658423) can be obtained adding 198658373 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194239969 + 4418404 = 13937^2 + 2102^2 .

It is an emirp because it is prime and its reverse (373856891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198658373 - 2⁶ = 198658309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198658333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99329186 + 99329187.

It is an arithmetic number, because the mean of its divisors is an integer number (99329187).

Almost surely, 2^198658373 is an apocalyptic number.

It is an amenable number.

198658373 is a deficient number, since it is larger than the sum of its proper divisors (1).

198658373 is an equidigital number, since it uses as much as digits as its factorization.

198658373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 198658373 is about 14094.6221304439. The cubic root of 198658373 is about 583.4929656904.

The spelling of 198658373 in words is "one hundred ninety-eight million, six hundred fifty-eight thousand, three hundred seventy-three".