11782013 has 4 divisors (see below), whose sum is σ = 11790240. Its totient is φ = 11773788.

The previous prime is 11781997. The next prime is 11782019. The reversal of 11782013 is 31028711.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11782013 - 2⁴ = 11781997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11782013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11782019) 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, 1343 + ... + 5036.

It is an arithmetic number, because the mean of its divisors is an integer number (2947560).

Almost surely, 2^11782013 is an apocalyptic number.

It is an amenable number.

11782013 is a deficient number, since it is larger than the sum of its proper divisors (8227).

11782013 is an equidigital number, since it uses as much as digits as its factorization.

11782013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11782013 is about 3432.4936999214. The cubic root of 11782013 is about 227.5480750150.

The spelling of 11782013 in words is "eleven million, seven hundred eighty-two thousand, thirteen".