1388603 has 2 divisors, whose sum is σ = 1388604. Its totient is φ = 1388602.

The previous prime is 1388593. The next prime is 1388623. The reversal of 1388603 is 3068831.

It is a weak prime.

It is an emirp because it is prime and its reverse (3068831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388603 - 2⁴ = 1388587 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694301 + 694302.

It is an arithmetic number, because the mean of its divisors is an integer number (694302).

2^1388603 is an apocalyptic number.

1388603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388603 is an equidigital number, since it uses as much as digits as its factorization.

1388603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1388603 is about 1178.3900033520. The cubic root of 1388603 is about 111.5645024840.

It can be divided in two parts, 1388 and 603, that added together give a palindrome (1991).

The spelling of 1388603 in words is "one million, three hundred eighty-eight thousand, six hundred three".