1328913 has 16 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 873792.

The previous prime is 1328911. The next prime is 1328923. The reversal of 1328913 is 3198231.

It is not a de Polignac number, because 1328913 - 2¹ = 1328911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 1945 + ... + 2537.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2^1328913 is an apocalyptic number.

It is an amenable number.

1328913 is a deficient number, since it is larger than the sum of its proper divisors (666927).

1328913 is an equidigital number, since it uses as much as digits as its factorization.

1328913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 679 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1328913 is about 1152.7848888670. The cubic root of 1328913 is about 109.9424768112.

It can be divided in two parts, 132 and 8913, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 1328913 in words is "one million, three hundred twenty-eight thousand, nine hundred thirteen".