198377617 has 2 divisors, whose sum is σ = 198377618. Its totient is φ = 198377616.

The previous prime is 198377593. The next prime is 198377633. The reversal of 198377617 is 716773891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192765456 + 5612161 = 13884^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 198377617 - 2¹⁵ = 198344849 is a prime.

It is not a weakly prime, because it can be changed into another prime (198377657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99188808 + 99188809.

It is an arithmetic number, because the mean of its divisors is an integer number (99188809).

Almost surely, 2^198377617 is an apocalyptic number.

It is an amenable number.

198377617 is a deficient number, since it is larger than the sum of its proper divisors (1).

198377617 is an equidigital number, since it uses as much as digits as its factorization.

198377617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 49.

The square root of 198377617 is about 14084.6589238078. The cubic root of 198377617 is about 583.2179602757.

The spelling of 198377617 in words is "one hundred ninety-eight million, three hundred seventy-seven thousand, six hundred seventeen".