1391329 has 4 divisors (see below), whose sum is σ = 1408176. Its totient is φ = 1374484.

The previous prime is 1391323. The next prime is 1391353. The reversal of 1391329 is 9231931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9231931 = 659 ⋅14009.

It is a cyclic number.

It is not a de Polignac number, because 1391329 - 2¹¹ = 1389281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1391297 and 1391306.

It is not an unprimeable number, because it can be changed into a prime (1391323) 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 in 3 ways as a sum of consecutive naturals, for example, 8299 + ... + 8464.

It is an arithmetic number, because the mean of its divisors is an integer number (352044).

2^1391329 is an apocalyptic number.

It is an amenable number.

1391329 is a deficient number, since it is larger than the sum of its proper divisors (16847).

1391329 is an equidigital number, since it uses as much as digits as its factorization.

1391329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16846.

The product of its digits is 1458, while the sum is 28.

The square root of 1391329 is about 1179.5460991415. The cubic root of 1391329 is about 111.6374597509.

The spelling of 1391329 in words is "one million, three hundred ninety-one thousand, three hundred twenty-nine".