193316489 has 2 divisors, whose sum is σ = 193316490. Its totient is φ = 193316488.

The previous prime is 193316467. The next prime is 193316551. The reversal of 193316489 is 984613391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157076089 + 36240400 = 12533^2 + 6020^2 .

It is an emirp because it is prime and its reverse (984613391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193316489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (193316429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96658244 + 96658245.

It is an arithmetic number, because the mean of its divisors is an integer number (96658245).

Almost surely, 2^193316489 is an apocalyptic number.

It is an amenable number.

193316489 is a deficient number, since it is larger than the sum of its proper divisors (1).

193316489 is an equidigital number, since it uses as much as digits as its factorization.

193316489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 193316489 is about 13903.8300119068. The cubic root of 193316489 is about 578.2153715419.

The spelling of 193316489 in words is "one hundred ninety-three million, three hundred sixteen thousand, four hundred eighty-nine".