1008971191117 has 2 divisors, whose sum is σ = 1008971191118. Its totient is φ = 1008971191116.

The previous prime is 1008971191099. The next prime is 1008971191147. The reversal of 1008971191117 is 7111911798001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755263545481 + 253707645636 = 869059^2 + 503694^2 .

It is an emirp because it is prime and its reverse (7111911798001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1008971191117 - 2⁷ = 1008971190989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008971191147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504485595558 + 504485595559.

It is an arithmetic number, because the mean of its divisors is an integer number (504485595559).

Almost surely, 2^{1008971191117} is an apocalyptic number.

It is an amenable number.

1008971191117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008971191117 is an equidigital number, since it uses as much as digits as its factorization.

1008971191117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 46.

The spelling of 1008971191117 in words is "one trillion, eight billion, nine hundred seventy-one million, one hundred ninety-one thousand, one hundred seventeen".