16931217989207 has 2 divisors, whose sum is σ = 16931217989208. Its totient is φ = 16931217989206.

The previous prime is 16931217989201. The next prime is 16931217989221. The reversal of 16931217989207 is 70298971213961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16931217989207 - 2⁶ = 16931217989143 is a prime.

It is a super-2 number, since 2×16931217989207² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16931217989201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8465608994603 + 8465608994604.

It is an arithmetic number, because the mean of its divisors is an integer number (8465608994604).

Almost surely, 2^{16931217989207} is an apocalyptic number.

16931217989207 is a deficient number, since it is larger than the sum of its proper divisors (1).

16931217989207 is an equidigital number, since it uses as much as digits as its factorization.

16931217989207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 16931217989207 in words is "sixteen trillion, nine hundred thirty-one billion, two hundred seventeen million, nine hundred eighty-nine thousand, two hundred seven".