193898161 has 2 divisors, whose sum is σ = 193898162. Its totient is φ = 193898160.

The previous prime is 193898129. The next prime is 193898191. The reversal of 193898161 is 161898391.

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., 128595600 + 65302561 = 11340^2 + 8081^2 .

It is an emirp because it is prime and its reverse (161898391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193898161 - 2⁵ = 193898129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (193898191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96949080 + 96949081.

It is an arithmetic number, because the mean of its divisors is an integer number (96949081).

Almost surely, 2^193898161 is an apocalyptic number.

It is an amenable number.

193898161 is a deficient number, since it is larger than the sum of its proper divisors (1).

193898161 is an equidigital number, since it uses as much as digits as its factorization.

193898161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 46.

The square root of 193898161 is about 13924.7319902395. The cubic root of 193898161 is about 578.7947236110.

The spelling of 193898161 in words is "one hundred ninety-three million, eight hundred ninety-eight thousand, one hundred sixty-one".