198888589 has 2 divisors, whose sum is σ = 198888590. Its totient is φ = 198888588.

The previous prime is 198888577. The next prime is 198888601. The reversal of 198888589 is 985888891.

It is a balanced prime because it is at equal distance from previous prime (198888577) and next prime (198888601).

It can be written as a sum of positive squares in only one way, i.e., 173132964 + 25755625 = 13158^2 + 5075^2 .

It is a cyclic number.

It is not a de Polignac number, because 198888589 - 2⁷ = 198888461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198888589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198888689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99444294 + 99444295.

It is an arithmetic number, because the mean of its divisors is an integer number (99444295).

Almost surely, 2^198888589 is an apocalyptic number.

It is an amenable number.

198888589 is a deficient number, since it is larger than the sum of its proper divisors (1).

198888589 is an equidigital number, since it uses as much as digits as its factorization.

198888589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13271040, while the sum is 64.

The square root of 198888589 is about 14102.7865686183. The cubic root of 198888589 is about 583.7182730167.

The spelling of 198888589 in words is "one hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred eighty-nine".