1398805864123 has 2 divisors, whose sum is σ = 1398805864124. Its totient is φ = 1398805864122.

The previous prime is 1398805864109. The next prime is 1398805864153. The reversal of 1398805864123 is 3214685088931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398805864123 - 2¹⁷ = 1398805733051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1398805864153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699402932061 + 699402932062.

It is an arithmetic number, because the mean of its divisors is an integer number (699402932062).

Almost surely, 2^{1398805864123} is an apocalyptic number.

1398805864123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398805864123 is an equidigital number, since it uses as much as digits as its factorization.

1398805864123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 1398805864123 in words is "one trillion, three hundred ninety-eight billion, eight hundred five million, eight hundred sixty-four thousand, one hundred twenty-three".