16679021897 has 2 divisors, whose sum is σ = 16679021898. Its totient is φ = 16679021896.

The previous prime is 16679021833. The next prime is 16679021911. The reversal of 16679021897 is 79812097661.

16679021897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9219072256 + 7459949641 = 96016^2 + 86371^2 .

It is a cyclic number.

It is not a de Polignac number, because 16679021897 - 2⁶ = 16679021833 is a prime.

It is not a weakly prime, because it can be changed into another prime (16679029897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339510948 + 8339510949.

It is an arithmetic number, because the mean of its divisors is an integer number (8339510949).

Almost surely, 2^16679021897 is an apocalyptic number.

It is an amenable number.

16679021897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16679021897 is an equidigital number, since it uses as much as digits as its factorization.

16679021897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 16679021897 in words is "sixteen billion, six hundred seventy-nine million, twenty-one thousand, eight hundred ninety-seven".