1386388643 has 2 divisors, whose sum is σ = 1386388644. Its totient is φ = 1386388642.

The previous prime is 1386388639. The next prime is 1386388651. The reversal of 1386388643 is 3468836831.

It is a weak prime.

It is an emirp because it is prime and its reverse (3468836831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1386388643 - 2² = 1386388639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1386388591 and 1386388600.

It is not a weakly prime, because it can be changed into another prime (1386388693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693194321 + 693194322.

It is an arithmetic number, because the mean of its divisors is an integer number (693194322).

Almost surely, 2^1386388643 is an apocalyptic number.

1386388643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386388643 is an equidigital number, since it uses as much as digits as its factorization.

1386388643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 50.

The square root of 1386388643 is about 37234.2401963569. The cubic root of 1386388643 is about 1115.0516825367.

The spelling of 1386388643 in words is "one billion, three hundred eighty-six million, three hundred eighty-eight thousand, six hundred forty-three".