194047457 has 2 divisors, whose sum is σ = 194047458. Its totient is φ = 194047456.

The previous prime is 194047453. The next prime is 194047459. The reversal of 194047457 is 754740491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 76020961 = 10864^2 + 8719^2 .

It is a cyclic number.

It is not a de Polignac number, because 194047457 - 2² = 194047453 is a prime.

Together with 194047459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194047453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97023728 + 97023729.

It is an arithmetic number, because the mean of its divisors is an integer number (97023729).

Almost surely, 2^194047457 is an apocalyptic number.

It is an amenable number.

194047457 is a deficient number, since it is larger than the sum of its proper divisors (1).

194047457 is an equidigital number, since it uses as much as digits as its factorization.

194047457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 194047457 is about 13930.0917800279. The cubic root of 194047457 is about 578.9432372567.

The spelling of 194047457 in words is "one hundred ninety-four million, forty-seven thousand, four hundred fifty-seven".