1388713643 has 2 divisors, whose sum is σ = 1388713644. Its totient is φ = 1388713642.

The previous prime is 1388713609. The next prime is 1388713699. The reversal of 1388713643 is 3463178831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1388713643 - 2¹² = 1388709547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1388713594 and 1388713603.

It is not a weakly prime, because it can be changed into another prime (1388713243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694356821 + 694356822.

It is an arithmetic number, because the mean of its divisors is an integer number (694356822).

Almost surely, 2^1388713643 is an apocalyptic number.

1388713643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388713643 is an equidigital number, since it uses as much as digits as its factorization.

1388713643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 1388713643 is about 37265.4483805039. The cubic root of 1388713643 is about 1115.6746553475.

The spelling of 1388713643 in words is "one billion, three hundred eighty-eight million, seven hundred thirteen thousand, six hundred forty-three".