198683389 has 2 divisors, whose sum is σ = 198683390. Its totient is φ = 198683388.

The previous prime is 198683383. The next prime is 198683393. The reversal of 198683389 is 983386891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181791289 + 16892100 = 13483^2 + 4110^2 .

It is an emirp because it is prime and its reverse (983386891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198683389 - 2²¹ = 196586237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198683383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99341694 + 99341695.

It is an arithmetic number, because the mean of its divisors is an integer number (99341695).

Almost surely, 2^198683389 is an apocalyptic number.

It is an amenable number.

198683389 is a deficient number, since it is larger than the sum of its proper divisors (1).

198683389 is an equidigital number, since it uses as much as digits as its factorization.

198683389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 198683389 is about 14095.5095331811. The cubic root of 198683389 is about 583.5174567252.

The spelling of 198683389 in words is "one hundred ninety-eight million, six hundred eighty-three thousand, three hundred eighty-nine".