1327755381 has 4 divisors (see below), whose sum is σ = 1770340512. Its totient is φ = 885170252.

The previous prime is 1327755379. The next prime is 1327755391. The reversal of 1327755381 is 1835577231.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1835577231 = 3 ⋅611859077.

It is a cyclic number.

It is not a de Polignac number, because 1327755381 - 2¹ = 1327755379 is a prime.

It is a super-2 number, since 2×1327755381² = 3525868703548910322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327755361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221292561 + ... + 221292566.

It is an arithmetic number, because the mean of its divisors is an integer number (442585128).

Almost surely, 2^1327755381 is an apocalyptic number.

It is an amenable number.

1327755381 is a deficient number, since it is larger than the sum of its proper divisors (442585131).

1327755381 is an equidigital number, since it uses as much as digits as its factorization.

1327755381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442585130.

The product of its digits is 176400, while the sum is 42.

The square root of 1327755381 is about 36438.3778590650. The cubic root of 1327755381 is about 1099.1054382704.

The spelling of 1327755381 in words is "one billion, three hundred twenty-seven million, seven hundred fifty-five thousand, three hundred eighty-one".