17181992117 has 2 divisors, whose sum is σ = 17181992118. Its totient is φ = 17181992116.

The previous prime is 17181991997. The next prime is 17181992161. The reversal of 17181992117 is 71129918171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15445269841 + 1736722276 = 124279^2 + 41674^2 .

It is a cyclic number.

It is not a de Polignac number, because 17181992117 - 2⁸ = 17181991861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17181982117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8590996058 + 8590996059.

It is an arithmetic number, because the mean of its divisors is an integer number (8590996059).

Almost surely, 2^17181992117 is an apocalyptic number.

It is an amenable number.

17181992117 is a deficient number, since it is larger than the sum of its proper divisors (1).

17181992117 is an equidigital number, since it uses as much as digits as its factorization.

17181992117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 47.

The spelling of 17181992117 in words is "seventeen billion, one hundred eighty-one million, nine hundred ninety-two thousand, one hundred seventeen".