1399711681873 has 2 divisors, whose sum is σ = 1399711681874. Its totient is φ = 1399711681872.

The previous prime is 1399711681871. The next prime is 1399711681903. The reversal of 1399711681873 is 3781861179931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178466567184 + 221245114689 = 1085572^2 + 470367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399711681873 - 2¹ = 1399711681871 is a prime.

Together with 1399711681871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1399711681871) 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 as a sum of consecutive naturals, namely, 699855840936 + 699855840937.

It is an arithmetic number, because the mean of its divisors is an integer number (699855840937).

Almost surely, 2^{1399711681873} is an apocalyptic number.

It is an amenable number.

1399711681873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399711681873 is an equidigital number, since it uses as much as digits as its factorization.

1399711681873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 64.

The spelling of 1399711681873 in words is "one trillion, three hundred ninety-nine billion, seven hundred eleven million, six hundred eighty-one thousand, eight hundred seventy-three".