1328105613 has 4 divisors (see below), whose sum is σ = 1770807488. Its totient is φ = 885403740.

The previous prime is 1328105599. The next prime is 1328105617. The reversal of 1328105613 is 3165018231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1328105613 - 2⁶ = 1328105549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328105617) 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, 221350933 + ... + 221350938.

It is an arithmetic number, because the mean of its divisors is an integer number (442701872).

Almost surely, 2^1328105613 is an apocalyptic number.

It is an amenable number.

1328105613 is a deficient number, since it is larger than the sum of its proper divisors (442701875).

1328105613 is an equidigital number, since it uses as much as digits as its factorization.

1328105613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442701874.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1328105613 is about 36443.1833543668. The cubic root of 1328105613 is about 1099.2020695375.

The spelling of 1328105613 in words is "one billion, three hundred twenty-eight million, one hundred five thousand, six hundred thirteen".