1388873 has 2 divisors, whose sum is σ = 1388874. Its totient is φ = 1388872.

The previous prime is 1388837. The next prime is 1388887. The reversal of 1388873 is 3788831.

Together with previous prime (1388837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364224 + 24649 = 1168^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388873 - 2¹⁰ = 1387849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694436 + 694437.

It is an arithmetic number, because the mean of its divisors is an integer number (694437).

2^1388873 is an apocalyptic number.

It is an amenable number.

1388873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388873 is an equidigital number, since it uses as much as digits as its factorization.

1388873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 1388873 is about 1178.5045608737. The cubic root of 1388873 is about 111.5717328836.

The spelling of 1388873 in words is "one million, three hundred eighty-eight thousand, eight hundred seventy-three".