1327343561 has 4 divisors (see below), whose sum is σ = 1405422612. Its totient is φ = 1249264512.

The previous prime is 1327343557. The next prime is 1327343569. The reversal of 1327343561 is 1653437231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1063086025 + 264257536 = 32605^2 + 16256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1327343561 - 2² = 1327343557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1327343569) 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, 39039500 + ... + 39039533.

It is an arithmetic number, because the mean of its divisors is an integer number (351355653).

Almost surely, 2^1327343561 is an apocalyptic number.

It is an amenable number.

1327343561 is a deficient number, since it is larger than the sum of its proper divisors (78079051).

1327343561 is an equidigital number, since it uses as much as digits as its factorization.

1327343561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78079050.

The product of its digits is 45360, while the sum is 35.

The square root of 1327343561 is about 36432.7265106525. The cubic root of 1327343561 is about 1098.9917927368.

The spelling of 1327343561 in words is "one billion, three hundred twenty-seven million, three hundred forty-three thousand, five hundred sixty-one".