194666497 has 2 divisors, whose sum is σ = 194666498. Its totient is φ = 194666496.

The previous prime is 194666477. The next prime is 194666501. The reversal of 194666497 is 794666491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194435136 + 231361 = 13944^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 194666497 - 2⁷ = 194666369 is a prime.

It is not a weakly prime, because it can be changed into another prime (194666477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97333248 + 97333249.

It is an arithmetic number, because the mean of its divisors is an integer number (97333249).

Almost surely, 2^194666497 is an apocalyptic number.

It is an amenable number.

194666497 is a deficient number, since it is larger than the sum of its proper divisors (1).

194666497 is an equidigital number, since it uses as much as digits as its factorization.

194666497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 194666497 is about 13952.2936107294. The cubic root of 194666497 is about 579.5582218530.

The spelling of 194666497 in words is "one hundred ninety-four million, six hundred sixty-six thousand, four hundred ninety-seven".