1356709 has 2 divisors, whose sum is σ = 1356710. Its totient is φ = 1356708.

The previous prime is 1356697. The next prime is 1356713. The reversal of 1356709 is 9076531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 124609 = 1110^2 + 353^2 .

It is an emirp because it is prime and its reverse (9076531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1356709 - 2⁹ = 1356197 is a prime.

1356709 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356109) 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, 678354 + 678355.

It is an arithmetic number, because the mean of its divisors is an integer number (678355).

2^1356709 is an apocalyptic number.

It is an amenable number.

1356709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356709 is an equidigital number, since it uses as much as digits as its factorization.

1356709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 1356709 is about 1164.7785197195. The cubic root of 1356709 is about 110.7037252303.

The spelling of 1356709 in words is "one million, three hundred fifty-six thousand, seven hundred nine".