1343689 has 2 divisors, whose sum is σ = 1343690. Its totient is φ = 1343688.

The previous prime is 1343681. The next prime is 1343717. The reversal of 1343689 is 9863431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 166464 = 1085^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343689 - 2³ = 1343681 is a prime.

1343689 is a lucky number.

It is a nialpdrome in base 6.

It is not a weakly prime, because it can be changed into another prime (1343681) 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, 671844 + 671845.

It is an arithmetic number, because the mean of its divisors is an integer number (671845).

2^1343689 is an apocalyptic number.

It is an amenable number.

1343689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343689 is an equidigital number, since it uses as much as digits as its factorization.

1343689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 1343689 is about 1159.1760004417. The cubic root of 1343689 is about 110.3484542417.

The spelling of 1343689 in words is "one million, three hundred forty-three thousand, six hundred eighty-nine".