11781327 has 4 divisors (see below), whose sum is σ = 15708440. Its totient is φ = 7854216.

The previous prime is 11781307. The next prime is 11781353. The reversal of 11781327 is 72318711.

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

It is not a de Polignac number, because 11781327 - 2⁷ = 11781199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11781294 and 11781303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11781307) 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, 1963552 + ... + 1963557.

It is an arithmetic number, because the mean of its divisors is an integer number (3927110).

Almost surely, 2^11781327 is an apocalyptic number.

11781327 is a deficient number, since it is larger than the sum of its proper divisors (3927113).

11781327 is an equidigital number, since it uses as much as digits as its factorization.

11781327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927112.

The product of its digits is 2352, while the sum is 30.

The square root of 11781327 is about 3432.3937711166. The cubic root of 11781327 is about 227.5436586500.

It can be divided in two parts, 1 and 1781327, that added together give a triangular number (1781328 = T₁₈₈₇).

The spelling of 11781327 in words is "eleven million, seven hundred eighty-one thousand, three hundred twenty-seven".