16931217989297 has 2 divisors, whose sum is σ = 16931217989298. Its totient is φ = 16931217989296.

The previous prime is 16931217989249. The next prime is 16931217989419. The reversal of 16931217989297 is 79298971213961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16601379121441 + 329838867856 = 4074479^2 + 574316^2 .

It is a cyclic number.

It is not a de Polignac number, because 16931217989297 - 2²⁰ = 16931216940721 is a prime.

It is a super-2 number, since 2×16931217989297² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16931217989207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8465608994648 + 8465608994649.

It is an arithmetic number, because the mean of its divisors is an integer number (8465608994649).

Almost surely, 2^{16931217989297} is an apocalyptic number.

It is an amenable number.

16931217989297 is a deficient number, since it is larger than the sum of its proper divisors (1).

16931217989297 is an equidigital number, since it uses as much as digits as its factorization.

16931217989297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185177664, while the sum is 74.

The spelling of 16931217989297 in words is "sixteen trillion, nine hundred thirty-one billion, two hundred seventeen million, nine hundred eighty-nine thousand, two hundred ninety-seven".