1349809 has 2 divisors, whose sum is σ = 1349810. Its totient is φ = 1349808.

The previous prime is 1349807. The next prime is 1349827. The reversal of 1349809 is 9089431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 664225 = 828^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349809 - 2¹ = 1349807 is a prime.

Together with 1349807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1349807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674904 + 674905.

It is an arithmetic number, because the mean of its divisors is an integer number (674905).

2^1349809 is an apocalyptic number.

It is an amenable number.

1349809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349809 is an equidigital number, since it uses as much as digits as its factorization.

1349809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1349809 is about 1161.8128076416. The cubic root of 1349809 is about 110.5157324910.

The spelling of 1349809 in words is "one million, three hundred forty-nine thousand, eight hundred nine".