9194969869 has 2 divisors, whose sum is σ = 9194969870. Its totient is φ = 9194969868.

The previous prime is 9194969867. The next prime is 9194969909. The reversal of 9194969869 is 9689694919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9175724100 + 19245769 = 95790^2 + 4387^2 .

It is a cyclic number.

It is not a de Polignac number, because 9194969869 - 2¹ = 9194969867 is a prime.

It is a super-2 number, since 2×9194969869² (a number of 21 digits) contains 22 as substring.

Together with 9194969867, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9194969798 and 9194969807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9194969867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4597484934 + 4597484935.

It is an arithmetic number, because the mean of its divisors is an integer number (4597484935).

Almost surely, 2^9194969869 is an apocalyptic number.

It is an amenable number.

9194969869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9194969869 is an equidigital number, since it uses as much as digits as its factorization.

9194969869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68024448, while the sum is 70.

The square root of 9194969869 is about 95890.4055106662. The cubic root of 9194969869 is about 2094.9971515275.

The spelling of 9194969869 in words is "nine billion, one hundred ninety-four million, nine hundred sixty-nine thousand, eight hundred sixty-nine".