198418807 has 2 divisors, whose sum is σ = 198418808. Its totient is φ = 198418806.

The previous prime is 198418799. The next prime is 198418811. The reversal of 198418807 is 708814891.

It is a strong prime.

It is an emirp because it is prime and its reverse (708814891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198418807 - 2³ = 198418799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198418837) 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, 99209403 + 99209404.

It is an arithmetic number, because the mean of its divisors is an integer number (99209404).

Almost surely, 2^198418807 is an apocalyptic number.

198418807 is a deficient number, since it is larger than the sum of its proper divisors (1).

198418807 is an equidigital number, since it uses as much as digits as its factorization.

198418807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 198418807 is about 14086.1210771454. The cubic root of 198418807 is about 583.2583228356.

The spelling of 198418807 in words is "one hundred ninety-eight million, four hundred eighteen thousand, eight hundred seven".