1399887814673 has 4 divisors (see below), whose sum is σ = 1399966792740. Its totient is φ = 1399808836608.

The previous prime is 1399887814651. The next prime is 1399887814679. The reversal of 1399887814673 is 3764187889931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 981391385104 + 418496429569 = 990652^2 + 646913^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399887814673 - 2¹⁴ = 1399887798289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1399887814673.

It is not an unprimeable number, because it can be changed into a prime (1399887814679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39462440 + ... + 39497897.

It is an arithmetic number, because the mean of its divisors is an integer number (349991698185).

Almost surely, 2^{1399887814673} is an apocalyptic number.

It is an amenable number.

1399887814673 is a deficient number, since it is larger than the sum of its proper divisors (78978067).

1399887814673 is an equidigital number, since it uses as much as digits as its factorization.

1399887814673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78978066.

The product of its digits is 438939648, while the sum is 74.

The spelling of 1399887814673 in words is "one trillion, three hundred ninety-nine billion, eight hundred eighty-seven million, eight hundred fourteen thousand, six hundred seventy-three".