1378339 has 2 divisors, whose sum is σ = 1378340. Its totient is φ = 1378338.

The previous prime is 1378337. The next prime is 1378373. The reversal of 1378339 is 9338731.

It is an a-pointer prime, because the next prime (1378373) can be obtained adding 1378339 to its sum of digits (34).

It is a weak prime.

It is an emirp because it is prime and its reverse (9338731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378339 - 2¹ = 1378337 is a prime.

Together with 1378337, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1378337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689169 + 689170.

It is an arithmetic number, because the mean of its divisors is an integer number (689170).

2^1378339 is an apocalyptic number.

1378339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378339 is an equidigital number, since it uses as much as digits as its factorization.

1378339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 1378339 is about 1174.0268310392. The cubic root of 1378339 is about 111.2889423068.

The spelling of 1378339 in words is "one million, three hundred seventy-eight thousand, three hundred thirty-nine".