1388719 has 2 divisors, whose sum is σ = 1388720. Its totient is φ = 1388718.

The previous prime is 1388701. The next prime is 1388743. The reversal of 1388719 is 9178831.

It is a weak prime.

It is an emirp because it is prime and its reverse (9178831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388719 - 2⁵ = 1388687 is a prime.

It is a super-2 number, since 2×1388719² = 3857080921922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694359 + 694360.

It is an arithmetic number, because the mean of its divisors is an integer number (694360).

2^1388719 is an apocalyptic number.

1388719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388719 is an equidigital number, since it uses as much as digits as its factorization.

1388719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 1388719 is about 1178.4392220221. The cubic root of 1388719 is about 111.5676089927.

The spelling of 1388719 in words is "one million, three hundred eighty-eight thousand, seven hundred nineteen".