198302989 has 2 divisors, whose sum is σ = 198302990. Its totient is φ = 198302988.

The previous prime is 198302969. The next prime is 198303013. The reversal of 198302989 is 989203891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197880489 + 422500 = 14067^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 198302989 - 2⁷ = 198302861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198302959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99151494 + 99151495.

It is an arithmetic number, because the mean of its divisors is an integer number (99151495).

Almost surely, 2^198302989 is an apocalyptic number.

It is an amenable number.

198302989 is a deficient number, since it is larger than the sum of its proper divisors (1).

198302989 is an equidigital number, since it uses as much as digits as its factorization.

198302989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 198302989 is about 14082.0094091717. The cubic root of 198302989 is about 583.1448171971.

The spelling of 198302989 in words is "one hundred ninety-eight million, three hundred two thousand, nine hundred eighty-nine".