1380679 has 2 divisors, whose sum is σ = 1380680. Its totient is φ = 1380678.

The previous prime is 1380677. The next prime is 1380707. The reversal of 1380679 is 9760831.

It is a weak prime.

It is an emirp because it is prime and its reverse (9760831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380679 - 2¹ = 1380677 is a prime.

Together with 1380677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690339 + 690340.

It is an arithmetic number, because the mean of its divisors is an integer number (690340).

2^1380679 is an apocalyptic number.

1380679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380679 is an equidigital number, since it uses as much as digits as its factorization.

1380679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1380679 is about 1175.0229784987. The cubic root of 1380679 is about 111.3518849488.

The spelling of 1380679 in words is "one million, three hundred eighty thousand, six hundred seventy-nine".