1331393 has 8 divisors (see below), whose sum is σ = 1559040. Its totient is φ = 1113120.

The previous prime is 1331383. The next prime is 1331399. The reversal of 1331393 is 3931331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331393 - 2⁴ = 1331377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2033 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (194880).

2^1331393 is an apocalyptic number.

It is an amenable number.

1331393 is a deficient number, since it is larger than the sum of its proper divisors (227647).

1331393 is an equidigital number, since it uses as much as digits as its factorization.

1331393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687.

The product of its digits is 729, while the sum is 23.

The square root of 1331393 is about 1153.8600435061. The cubic root of 1331393 is about 110.0108253809.

The spelling of 1331393 in words is "one million, three hundred thirty-one thousand, three hundred ninety-three".