191063956969 has 2 divisors, whose sum is σ = 191063956970. Its totient is φ = 191063956968.

The previous prime is 191063956891. The next prime is 191063956987. The reversal of 191063956969 is 969659360191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100940914944 + 90123042025 = 317712^2 + 300205^2 .

It is a cyclic number.

It is not a de Polignac number, because 191063956969 - 2²¹ = 191061859817 is a prime.

It is a super-2 number, since 2×191063956969² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191063956969.

It is not a weakly prime, because it can be changed into another prime (191063956169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95531978484 + 95531978485.

It is an arithmetic number, because the mean of its divisors is an integer number (95531978485).

Almost surely, 2^191063956969 is an apocalyptic number.

It is an amenable number.

191063956969 is a deficient number, since it is larger than the sum of its proper divisors (1).

191063956969 is an equidigital number, since it uses as much as digits as its factorization.

191063956969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21257640, while the sum is 64.

The spelling of 191063956969 in words is "one hundred ninety-one billion, sixty-three million, nine hundred fifty-six thousand, nine hundred sixty-nine".