1328623 has 4 divisors (see below), whose sum is σ = 1347408. Its totient is φ = 1309840.

The previous prime is 1328617. The next prime is 1328647. The reversal of 1328623 is 3268231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3268231 = 23 ⋅142097.

It is a cyclic number.

It is not a de Polignac number, because 1328623 - 2⁹ = 1328111 is a prime.

It is a super-2 number, since 2×1328623² = 3530478152258, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 3 + 2⁴ + 8² + 6⁷ + 2²⁰ + 3³ .

It is a Duffinian number.

It is a plaindrome in base 9 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328603) 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, 9286 + ... + 9427.

It is an arithmetic number, because the mean of its divisors is an integer number (336852).

2^1328623 is an apocalyptic number.

1328623 is a deficient number, since it is larger than the sum of its proper divisors (18785).

1328623 is an equidigital number, since it uses as much as digits as its factorization.

1328623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18784.

The product of its digits is 1728, while the sum is 25.

The square root of 1328623 is about 1152.6590996474. The cubic root of 1328623 is about 109.9344788867.

The spelling of 1328623 in words is "one million, three hundred twenty-eight thousand, six hundred twenty-three".