194666957 has 2 divisors, whose sum is σ = 194666958. Its totient is φ = 194666956.

The previous prime is 194666947. The next prime is 194666993. The reversal of 194666957 is 759666491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172633321 + 22033636 = 13139^2 + 4694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194666957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 194666899 and 194666908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194666947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97333478 + 97333479.

It is an arithmetic number, because the mean of its divisors is an integer number (97333479).

Almost surely, 2^194666957 is an apocalyptic number.

It is an amenable number.

194666957 is a deficient number, since it is larger than the sum of its proper divisors (1).

194666957 is an equidigital number, since it uses as much as digits as its factorization.

194666957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 53.

The square root of 194666957 is about 13952.3100954645. The cubic root of 194666957 is about 579.5586783544.

The spelling of 194666957 in words is "one hundred ninety-four million, six hundred sixty-six thousand, nine hundred fifty-seven".