194799847969 has 2 divisors, whose sum is σ = 194799847970. Its totient is φ = 194799847968.

The previous prime is 194799847889. The next prime is 194799847997. The reversal of 194799847969 is 969748997491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189943430625 + 4856417344 = 435825^2 + 69688^2 .

It is a cyclic number.

It is not a de Polignac number, because 194799847969 - 2³³ = 186209913377 is a prime.

It is a super-2 number, since 2×194799847969² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194799847892 and 194799847901.

It is not a weakly prime, because it can be changed into another prime (194799847369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97399923984 + 97399923985.

It is an arithmetic number, because the mean of its divisors is an integer number (97399923985).

Almost surely, 2^194799847969 is an apocalyptic number.

It is an amenable number.

194799847969 is a deficient number, since it is larger than the sum of its proper divisors (1).

194799847969 is an equidigital number, since it uses as much as digits as its factorization.

194799847969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222131968, while the sum is 82.

The spelling of 194799847969 in words is "one hundred ninety-four billion, seven hundred ninety-nine million, eight hundred forty-seven thousand, nine hundred sixty-nine".