11781283 has 4 divisors (see below), whose sum is σ = 11817208. Its totient is φ = 11745360.

The previous prime is 11781257. The next prime is 11781307. The reversal of 11781283 is 38218711.

It is a happy number.

11781283 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38218711 = 613 ⋅62347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11781283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11781233) 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, 17466 + ... + 18127.

It is an arithmetic number, because the mean of its divisors is an integer number (2954302).

Almost surely, 2^11781283 is an apocalyptic number.

11781283 is a deficient number, since it is larger than the sum of its proper divisors (35925).

11781283 is an equidigital number, since it uses as much as digits as its factorization.

11781283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35924.

The product of its digits is 2688, while the sum is 31.

The square root of 11781283 is about 3432.3873615896. The cubic root of 11781283 is about 227.5433753788.

Adding to 11781283 its reverse (38218711), we get a palindrome (49999994).

The spelling of 11781283 in words is "eleven million, seven hundred eighty-one thousand, two hundred eighty-three".