1388693 has 2 divisors, whose sum is σ = 1388694. Its totient is φ = 1388692.

The previous prime is 1388687. The next prime is 1388701. The reversal of 1388693 is 3968831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1385329 + 3364 = 1177^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388693 - 2¹⁰ = 1387669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694346 + 694347.

It is an arithmetic number, because the mean of its divisors is an integer number (694347).

2^1388693 is an apocalyptic number.

It is an amenable number.

1388693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388693 is an equidigital number, since it uses as much as digits as its factorization.

1388693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 1388693 is about 1178.4281904299. The cubic root of 1388693 is about 111.5669127213.

The spelling of 1388693 in words is "one million, three hundred eighty-eight thousand, six hundred ninety-three".