194401791473 has 2 divisors, whose sum is σ = 194401791474. Its totient is φ = 194401791472.

The previous prime is 194401791323. The next prime is 194401791481. The reversal of 194401791473 is 374197104491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194382228544 + 19562929 = 440888^2 + 4423^2 .

It is a cyclic number.

It is not a de Polignac number, because 194401791473 - 2⁸ = 194401791217 is a prime.

It is not a weakly prime, because it can be changed into another prime (194401791673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97200895736 + 97200895737.

It is an arithmetic number, because the mean of its divisors is an integer number (97200895737).

Almost surely, 2^194401791473 is an apocalyptic number.

It is an amenable number.

194401791473 is a deficient number, since it is larger than the sum of its proper divisors (1).

194401791473 is an equidigital number, since it uses as much as digits as its factorization.

194401791473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 194401791473 in words is "one hundred ninety-four billion, four hundred one million, seven hundred ninety-one thousand, four hundred seventy-three".