198074077 has 2 divisors, whose sum is σ = 198074078. Its totient is φ = 198074076.

The previous prime is 198074059. The next prime is 198074081. The reversal of 198074077 is 770470891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169494361 + 28579716 = 13019^2 + 5346^2 .

It is an emirp because it is prime and its reverse (770470891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198074077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198074087) 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, 99037038 + 99037039.

It is an arithmetic number, because the mean of its divisors is an integer number (99037039).

Almost surely, 2^198074077 is an apocalyptic number.

It is an amenable number.

198074077 is a deficient number, since it is larger than the sum of its proper divisors (1).

198074077 is an equidigital number, since it uses as much as digits as its factorization.

198074077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 198074077 is about 14073.8792448990. The cubic root of 198074077 is about 582.9203454690.

The spelling of 198074077 in words is "one hundred ninety-eight million, seventy-four thousand, seventy-seven".