198320939 has 2 divisors, whose sum is σ = 198320940. Its totient is φ = 198320938.

The previous prime is 198320933. The next prime is 198320951. The reversal of 198320939 is 939023891.

198320939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198320939 - 2¹² = 198316843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198320939.

It is not a weakly prime, because it can be changed into another prime (198320933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99160469 + 99160470.

It is an arithmetic number, because the mean of its divisors is an integer number (99160470).

Almost surely, 2^198320939 is an apocalyptic number.

198320939 is a deficient number, since it is larger than the sum of its proper divisors (1).

198320939 is an equidigital number, since it uses as much as digits as its factorization.

198320939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 198320939 is about 14082.6467327701. The cubic root of 198320939 is about 583.1624117103.

It can be divided in two parts, 1983 and 20939, that added together give a palindrome (22922).

The spelling of 198320939 in words is "one hundred ninety-eight million, three hundred twenty thousand, nine hundred thirty-nine".