194181101 has 2 divisors, whose sum is σ = 194181102. Its totient is φ = 194181100.

The previous prime is 194181061. The next prime is 194181103. The reversal of 194181101 is 101181491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185776900 + 8404201 = 13630^2 + 2899^2 .

It is an emirp because it is prime and its reverse (101181491) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194181101 is a prime.

Together with 194181103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194181103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97090550 + 97090551.

It is an arithmetic number, because the mean of its divisors is an integer number (97090551).

Almost surely, 2^194181101 is an apocalyptic number.

It is an amenable number.

194181101 is a deficient number, since it is larger than the sum of its proper divisors (1).

194181101 is an equidigital number, since it uses as much as digits as its factorization.

194181101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The square root of 194181101 is about 13934.8879076941. The cubic root of 194181101 is about 579.0761163222.

The spelling of 194181101 in words is "one hundred ninety-four million, one hundred eighty-one thousand, one hundred one".