191338971163 has 2 divisors, whose sum is σ = 191338971164. Its totient is φ = 191338971162.

The previous prime is 191338971139. The next prime is 191338971191. The reversal of 191338971163 is 361179833191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191338971163 - 2²¹ = 191336874011 is a prime.

It is a super-2 number, since 2×191338971163² (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 191338971163.

It is not a weakly prime, because it can be changed into another prime (191338971763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95669485581 + 95669485582.

It is an arithmetic number, because the mean of its divisors is an integer number (95669485582).

Almost surely, 2^191338971163 is an apocalyptic number.

191338971163 is a deficient number, since it is larger than the sum of its proper divisors (1).

191338971163 is an equidigital number, since it uses as much as digits as its factorization.

191338971163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The spelling of 191338971163 in words is "one hundred ninety-one billion, three hundred thirty-eight million, nine hundred seventy-one thousand, one hundred sixty-three".