1388393 has 2 divisors, whose sum is σ = 1388394. Its totient is φ = 1388392.

The previous prime is 1388381. The next prime is 1388411. The reversal of 1388393 is 3938831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 394384 = 997^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388393 - 2¹⁶ = 1322857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694196 + 694197.

It is an arithmetic number, because the mean of its divisors is an integer number (694197).

2^1388393 is an apocalyptic number.

It is an amenable number.

1388393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388393 is an equidigital number, since it uses as much as digits as its factorization.

1388393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 1388393 is about 1178.3008953574. The cubic root of 1388393 is about 111.5588781919.

The spelling of 1388393 in words is "one million, three hundred eighty-eight thousand, three hundred ninety-three".