198601489 has 2 divisors, whose sum is σ = 198601490. Its totient is φ = 198601488.

The previous prime is 198601423. The next prime is 198601517. The reversal of 198601489 is 984106891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 95883264 = 10135^2 + 9792^2 .

It is an emirp because it is prime and its reverse (984106891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198601489 - 2¹⁷ = 198470417 is a prime.

It is a super-3 number, since 3×198601489³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (198601409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99300744 + 99300745.

It is an arithmetic number, because the mean of its divisors is an integer number (99300745).

Almost surely, 2^198601489 is an apocalyptic number.

It is an amenable number.

198601489 is a deficient number, since it is larger than the sum of its proper divisors (1).

198601489 is an equidigital number, since it uses as much as digits as its factorization.

198601489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 198601489 is about 14092.6040531905. The cubic root of 198601489 is about 583.4372677572.

The spelling of 198601489 in words is "one hundred ninety-eight million, six hundred one thousand, four hundred eighty-nine".