1388633 has 2 divisors, whose sum is σ = 1388634. Its totient is φ = 1388632.

The previous prime is 1388627. The next prime is 1388641. The reversal of 1388633 is 3368831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753424 + 635209 = 868^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388633 - 2²⁰ = 340057 is a prime.

It is a super-3 number, since 3×1388633³ = 8033109743335896411, which contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388633.

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, 694316 + 694317.

It is an arithmetic number, because the mean of its divisors is an integer number (694317).

2^1388633 is an apocalyptic number.

It is an amenable number.

1388633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388633 is an equidigital number, since it uses as much as digits as its factorization.

1388633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 1388633 is about 1178.4027325155. The cubic root of 1388633 is about 111.5653059080.

The spelling of 1388633 in words is "one million, three hundred eighty-eight thousand, six hundred thirty-three".