198370489 has 2 divisors, whose sum is σ = 198370490. Its totient is φ = 198370488.

The previous prime is 198370463. The next prime is 198370541. The reversal of 198370489 is 984073891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197880489 + 490000 = 14067^2 + 700^2 .

It is an emirp because it is prime and its reverse (984073891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198370489 - 2²³ = 189981881 is a prime.

It is not a weakly prime, because it can be changed into another prime (198370429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99185244 + 99185245.

It is an arithmetic number, because the mean of its divisors is an integer number (99185245).

Almost surely, 2^198370489 is an apocalyptic number.

It is an amenable number.

198370489 is a deficient number, since it is larger than the sum of its proper divisors (1).

198370489 is an equidigital number, since it uses as much as digits as its factorization.

198370489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 198370489 is about 14084.4058802635. The cubic root of 198370489 is about 583.2109748986.

The spelling of 198370489 in words is "one hundred ninety-eight million, three hundred seventy thousand, four hundred eighty-nine".