1391393 has 2 divisors, whose sum is σ = 1391394. Its totient is φ = 1391392.

The previous prime is 1391381. The next prime is 1391407. The reversal of 1391393 is 3931931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966289 + 425104 = 983^2 + 652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391393 - 2¹⁰ = 1390369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1391323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695696 + 695697.

It is an arithmetic number, because the mean of its divisors is an integer number (695697).

2^1391393 is an apocalyptic number.

It is an amenable number.

1391393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391393 is an equidigital number, since it uses as much as digits as its factorization.

1391393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 29.

The square root of 1391393 is about 1179.5732279091. The cubic root of 1391393 is about 111.6391714687.

The spelling of 1391393 in words is "one million, three hundred ninety-one thousand, three hundred ninety-three".