1399589 has 2 divisors, whose sum is σ = 1399590. Its totient is φ = 1399588.

The previous prime is 1399583. The next prime is 1399603. The reversal of 1399589 is 9859931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1399489 + 100 = 1183^2 + 10^2 .

It is an emirp because it is prime and its reverse (9859931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399583) 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, 699794 + 699795.

It is an arithmetic number, because the mean of its divisors is an integer number (699795).

2^1399589 is an apocalyptic number.

It is an amenable number.

1399589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399589 is an equidigital number, since it uses as much as digits as its factorization.

1399589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 44.

The square root of 1399589 is about 1183.0422646719. The cubic root of 1399589 is about 111.8579459663.

The spelling of 1399589 in words is "one million, three hundred ninety-nine thousand, five hundred eighty-nine".