194188961 has 2 divisors, whose sum is σ = 194188962. Its totient is φ = 194188960.

The previous prime is 194188937. The next prime is 194188993. The reversal of 194188961 is 169881491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110649361 + 83539600 = 10519^2 + 9140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194188961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194188861) 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, 97094480 + 97094481.

It is an arithmetic number, because the mean of its divisors is an integer number (97094481).

Almost surely, 2^194188961 is an apocalyptic number.

It is an amenable number.

194188961 is a deficient number, since it is larger than the sum of its proper divisors (1).

194188961 is an equidigital number, since it uses as much as digits as its factorization.

194188961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 47.

The square root of 194188961 is about 13935.1699307902. The cubic root of 194188961 is about 579.0839294356.

The spelling of 194188961 in words is "one hundred ninety-four million, one hundred eighty-eight thousand, nine hundred sixty-one".