194799847997 has 2 divisors, whose sum is σ = 194799847998. Its totient is φ = 194799847996.

The previous prime is 194799847969. The next prime is 194799848029. The reversal of 194799847997 is 799748997491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137156159716 + 57643688281 = 370346^2 + 240091^2 .

It is an emirp because it is prime and its reverse (799748997491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194799847997 - 2²⁶ = 194732739133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194799847597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97399923998 + 97399923999.

It is an arithmetic number, because the mean of its divisors is an integer number (97399923999).

Almost surely, 2^194799847997 is an apocalyptic number.

It is an amenable number.

194799847997 is a deficient number, since it is larger than the sum of its proper divisors (1).

194799847997 is an equidigital number, since it uses as much as digits as its factorization.

194799847997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592487296, while the sum is 83.

The spelling of 194799847997 in words is "one hundred ninety-four billion, seven hundred ninety-nine million, eight hundred forty-seven thousand, nine hundred ninety-seven".