1327825309 has 4 divisors (see below), whose sum is σ = 1328277916. Its totient is φ = 1327372704.

The previous prime is 1327825297. The next prime is 1327825313. The reversal of 1327825309 is 9035287231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9035287231 = 1229 ⋅7351739.

It can be written as a sum of positive squares in 2 ways, for example, as 663320025 + 664505284 = 25755^2 + 25778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1327825309 - 2⁵ = 1327825277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327825399) 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, 221874 + ... + 227779.

It is an arithmetic number, because the mean of its divisors is an integer number (332069479).

Almost surely, 2^1327825309 is an apocalyptic number.

It is an amenable number.

1327825309 is a deficient number, since it is larger than the sum of its proper divisors (452607).

1327825309 is an equidigital number, since it uses as much as digits as its factorization.

1327825309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452606.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1327825309 is about 36439.3373842061. The cubic root of 1327825309 is about 1099.1247332141.

The spelling of 1327825309 in words is "one billion, three hundred twenty-seven million, eight hundred twenty-five thousand, three hundred nine".