1327561091 has 4 divisors (see below), whose sum is σ = 1339968312. Its totient is φ = 1315153872.

The previous prime is 1327561087. The next prime is 1327561139. The reversal of 1327561091 is 1901657231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1901657231 = 389 ⋅4888579.

It is a cyclic number.

It is not a de Polignac number, because 1327561091 - 2² = 1327561087 is a prime.

It is a super-2 number, since 2×1327561091² = 3524836900674220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1327561051) 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, 6203450 + ... + 6203663.

It is an arithmetic number, because the mean of its divisors is an integer number (334992078).

Almost surely, 2^1327561091 is an apocalyptic number.

1327561091 is a deficient number, since it is larger than the sum of its proper divisors (12407221).

1327561091 is a wasteful number, since it uses less digits than its factorization.

1327561091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12407220.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1327561091 is about 36435.7117537177. The cubic root of 1327561091 is about 1099.0518250784.

The spelling of 1327561091 in words is "one billion, three hundred twenty-seven million, five hundred sixty-one thousand, ninety-one".