194624161 has 2 divisors, whose sum is σ = 194624162. Its totient is φ = 194624160.

The previous prime is 194624159. The next prime is 194624167. The reversal of 194624161 is 161426491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111175936 + 83448225 = 10544^2 + 9135^2 .

It is an emirp because it is prime and its reverse (161426491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194624161 - 2¹ = 194624159 is a prime.

Together with 194624159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (194624167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97312080 + 97312081.

It is an arithmetic number, because the mean of its divisors is an integer number (97312081).

Almost surely, 2^194624161 is an apocalyptic number.

It is an amenable number.

194624161 is a deficient number, since it is larger than the sum of its proper divisors (1).

194624161 is an equidigital number, since it uses as much as digits as its factorization.

194624161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 194624161 is about 13950.7763583250. The cubic root of 194624161 is about 579.5162047687.

The spelling of 194624161 in words is "one hundred ninety-four million, six hundred twenty-four thousand, one hundred sixty-one".