1388793643 has 2 divisors, whose sum is σ = 1388793644. Its totient is φ = 1388793642.

The previous prime is 1388793611. The next prime is 1388793689. The reversal of 1388793643 is 3463978831.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3463978831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388793643 - 2⁵ = 1388793611 is a prime.

It is a super-2 number, since 2×1388793643² = 3857495565674422898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1388793143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694396821 + 694396822.

It is an arithmetic number, because the mean of its divisors is an integer number (694396822).

Almost surely, 2^1388793643 is an apocalyptic number.

1388793643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388793643 is an equidigital number, since it uses as much as digits as its factorization.

1388793643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The square root of 1388793643 is about 37266.5217453950. The cubic root of 1388793643 is about 1115.6960785927.

The spelling of 1388793643 in words is "one billion, three hundred eighty-eight million, seven hundred ninety-three thousand, six hundred forty-three".