1328919 has 4 divisors (see below), whose sum is σ = 1771896. Its totient is φ = 885944.

The previous prime is 1328911. The next prime is 1328923. The reversal of 1328919 is 9198231.

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

It is a cyclic number.

It is not a de Polignac number, because 1328919 - 2³ = 1328911 is a prime.

It is a super-2 number, since 2×1328919² = 3532051417122, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1328919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328911) 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, 221484 + ... + 221489.

It is an arithmetic number, because the mean of its divisors is an integer number (442974).

2^1328919 is an apocalyptic number.

1328919 is a deficient number, since it is larger than the sum of its proper divisors (442977).

1328919 is an equidigital number, since it uses as much as digits as its factorization.

1328919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442976.

The product of its digits is 3888, while the sum is 33.

The square root of 1328919 is about 1152.7874912576. The cubic root of 1328919 is about 109.9426422732.

The spelling of 1328919 in words is "one million, three hundred twenty-eight thousand, nine hundred nineteen".