1349678689889 has 2 divisors, whose sum is σ = 1349678689890. Its totient is φ = 1349678689888.

The previous prime is 1349678689789. The next prime is 1349678689969. The reversal of 1349678689889 is 9889868769431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1332316147600 + 17362542289 = 1154260^2 + 131767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1349678689889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1349678689889.

It is not a weakly prime, because it can be changed into another prime (1349678689189) 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, 674839344944 + 674839344945.

It is an arithmetic number, because the mean of its divisors is an integer number (674839344945).

Almost surely, 2^{1349678689889} is an apocalyptic number.

It is an amenable number.

1349678689889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349678689889 is an equidigital number, since it uses as much as digits as its factorization.

1349678689889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9029615616, while the sum is 86.

The spelling of 1349678689889 in words is "one trillion, three hundred forty-nine billion, six hundred seventy-eight million, six hundred eighty-nine thousand, eight hundred eighty-nine".