1393649 has 2 divisors, whose sum is σ = 1393650. Its totient is φ = 1393648.

The previous prime is 1393633. The next prime is 1393657. The reversal of 1393649 is 9463931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 112225 = 1132^2 + 335^2 .

It is an emirp because it is prime and its reverse (9463931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1393649 - 2⁴ = 1393633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1393619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696824 + 696825.

It is an arithmetic number, because the mean of its divisors is an integer number (696825).

2^1393649 is an apocalyptic number.

It is an amenable number.

1393649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393649 is an equidigital number, since it uses as much as digits as its factorization.

1393649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 1393649 is about 1180.5291186582. The cubic root of 1393649 is about 111.6994760155.

The spelling of 1393649 in words is "one million, three hundred ninety-three thousand, six hundred forty-nine".