194216447 has 2 divisors, whose sum is σ = 194216448. Its totient is φ = 194216446.

The previous prime is 194216443. The next prime is 194216459. The reversal of 194216447 is 744612491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194216447 - 2² = 194216443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194216447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194216443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97108223 + 97108224.

It is an arithmetic number, because the mean of its divisors is an integer number (97108224).

Almost surely, 2^194216447 is an apocalyptic number.

194216447 is a deficient number, since it is larger than the sum of its proper divisors (1).

194216447 is an equidigital number, since it uses as much as digits as its factorization.

194216447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 194216447 is about 13936.1561056125. The cubic root of 194216447 is about 579.1112498179. Note that the first 3 decimals are identical.

The spelling of 194216447 in words is "one hundred ninety-four million, two hundred sixteen thousand, four hundred forty-seven".