198929 has 2 divisors, whose sum is σ = 198930. Its totient is φ = 198928.

The previous prime is 198901. The next prime is 198937. The reversal of 198929 is 929891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 5329 = 440^2 + 73^2 .

It is an emirp because it is prime and its reverse (929891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198929 - 2⁸ = 198673 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 198892 and 198901.

It is not a weakly prime, because it can be changed into another prime (198959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99464 + 99465.

It is an arithmetic number, because the mean of its divisors is an integer number (99465).

2¹⁹⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

198929 is a deficient number, since it is larger than the sum of its proper divisors (1).

198929 is an equidigital number, since it uses as much as digits as its factorization.

198929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 38.

The square root of 198929 is about 446.0145737529. The cubic root of 198929 is about 58.3757804431.

Subtracting from 198929 its sum of digits (38), we obtain a palindrome (198891).

The spelling of 198929 in words is "one hundred ninety-eight thousand, nine hundred twenty-nine".