1328693 has 4 divisors (see below), whose sum is σ = 1374540. Its totient is φ = 1282848.

The previous prime is 1328683. The next prime is 1328699. The reversal of 1328693 is 3968231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 966289 + 362404 = 983^2 + 602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328693 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22880 + ... + 22937.

It is an arithmetic number, because the mean of its divisors is an integer number (343635).

2^1328693 is an apocalyptic number.

It is an amenable number.

1328693 is a deficient number, since it is larger than the sum of its proper divisors (45847).

1328693 is an equidigital number, since it uses as much as digits as its factorization.

1328693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45846.

The product of its digits is 7776, while the sum is 32.

The square root of 1328693 is about 1152.6894638193. The cubic root of 1328693 is about 109.9364095267.

The spelling of 1328693 in words is "one million, three hundred twenty-eight thousand, six hundred ninety-three".