17979217366927 has 2 divisors, whose sum is σ = 17979217366928. Its totient is φ = 17979217366926.

The previous prime is 17979217366871. The next prime is 17979217367051. The reversal of 17979217366927 is 72966371297971.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17979217366927 - 2¹⁵ = 17979217334159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17979217306927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8989608683463 + 8989608683464.

It is an arithmetic number, because the mean of its divisors is an integer number (8989608683464).

Almost surely, 2^{17979217366927} is an apocalyptic number.

17979217366927 is a deficient number, since it is larger than the sum of its proper divisors (1).

17979217366927 is an equidigital number, since it uses as much as digits as its factorization.

17979217366927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756142128, while the sum is 76.

The spelling of 17979217366927 in words is "seventeen trillion, nine hundred seventy-nine billion, two hundred seventeen million, three hundred sixty-six thousand, nine hundred twenty-seven".