11781393 has 16 divisors (see below), whose sum is σ = 16994880. Its totient is φ = 7216704.

The previous prime is 11781389. The next prime is 11781421. The reversal of 11781393 is 39318711.

It is not a de Polignac number, because 11781393 - 2² = 11781389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11781353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9930 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (1062180).

Almost surely, 2^11781393 is an apocalyptic number.

11781393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11781393 is a deficient number, since it is larger than the sum of its proper divisors (5213487).

11781393 is a wasteful number, since it uses less digits than its factorization.

11781393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408.

The product of its digits is 4536, while the sum is 33.

The square root of 11781393 is about 3432.4033853846. The cubic root of 11781393 is about 227.5440835556.

The spelling of 11781393 in words is "eleven million, seven hundred eighty-one thousand, three hundred ninety-three".