1391323 has 2 divisors, whose sum is σ = 1391324. Its totient is φ = 1391322.

The previous prime is 1391317. The next prime is 1391353. The reversal of 1391323 is 3231931.

It is a weak prime.

It is an emirp because it is prime and its reverse (3231931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391323 is a prime.

It is equal to p₁₀₆₄₈₃ and since 1391323 and 106483 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1391294 and 1391303.

It is not a weakly prime, because it can be changed into another prime (1391353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695661 + 695662.

It is an arithmetic number, because the mean of its divisors is an integer number (695662).

2^1391323 is an apocalyptic number.

1391323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391323 is an equidigital number, since it uses as much as digits as its factorization.

1391323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

The square root of 1391323 is about 1179.5435557876. The cubic root of 1391323 is about 111.6372992747.

The spelling of 1391323 in words is "one million, three hundred ninety-one thousand, three hundred twenty-three".