1331339 has 2 divisors, whose sum is σ = 1331340. Its totient is φ = 1331338.

The previous prime is 1331333. The next prime is 1331347. The reversal of 1331339 is 9331331.

It is a weak prime.

It is an emirp because it is prime and its reverse (9331331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665669 + 665670.

It is an arithmetic number, because the mean of its divisors is an integer number (665670).

2^1331339 is an apocalyptic number.

1331339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331339 is an equidigital number, since it uses as much as digits as its factorization.

1331339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 23.

The square root of 1331339 is about 1153.8366435506. The cubic root of 1331339 is about 110.0093380502.

The spelling of 1331339 in words is "one million, three hundred thirty-one thousand, three hundred thirty-nine".