1679218899089 has 2 divisors, whose sum is σ = 1679218899090. Its totient is φ = 1679218899088.

The previous prime is 1679218899077. The next prime is 1679218899103. The reversal of 1679218899089 is 9809988129761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1026185208064 + 653033691025 = 1013008^2 + 808105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1679218899089 is a prime.

It is a super-2 number, since 2×1679218899089² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1679218895089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839609449544 + 839609449545.

It is an arithmetic number, because the mean of its divisors is an integer number (839609449545).

Almost surely, 2^{1679218899089} is an apocalyptic number.

It is an amenable number.

1679218899089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679218899089 is an equidigital number, since it uses as much as digits as its factorization.

1679218899089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282175488, while the sum is 77.

The spelling of 1679218899089 in words is "one trillion, six hundred seventy-nine billion, two hundred eighteen million, eight hundred ninety-nine thousand, eighty-nine".