194609161 has 2 divisors, whose sum is σ = 194609162. Its totient is φ = 194609160.

The previous prime is 194609147. The next prime is 194609171. The reversal of 194609161 is 161906491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160503561 + 34105600 = 12669^2 + 5840^2 .

It is a cyclic number.

It is not a de Polignac number, because 194609161 - 2⁷ = 194609033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194609161.

It is not a weakly prime, because it can be changed into another prime (194609131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97304580 + 97304581.

It is an arithmetic number, because the mean of its divisors is an integer number (97304581).

Almost surely, 2^194609161 is an apocalyptic number.

It is an amenable number.

194609161 is a deficient number, since it is larger than the sum of its proper divisors (1).

194609161 is an equidigital number, since it uses as much as digits as its factorization.

194609161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 194609161 is about 13950.2387434768. The cubic root of 194609161 is about 579.5013163014.

The spelling of 194609161 in words is "one hundred ninety-four million, six hundred nine thousand, one hundred sixty-one".