11785643 has 4 divisors (see below), whose sum is σ = 12405960. Its totient is φ = 11165328.

The previous prime is 11785633. The next prime is 11785649. The reversal of 11785643 is 34658711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34658711 = 997 ⋅34763.

It is a cyclic number.

It is not a de Polignac number, because 11785643 - 2¹² = 11781547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11785649) 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, 310130 + ... + 310167.

It is an arithmetic number, because the mean of its divisors is an integer number (3101490).

Almost surely, 2^11785643 is an apocalyptic number.

11785643 is a deficient number, since it is larger than the sum of its proper divisors (620317).

11785643 is an equidigital number, since it uses as much as digits as its factorization.

11785643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620316.

The product of its digits is 20160, while the sum is 35.

The square root of 11785643 is about 3433.0224292888. The cubic root of 11785643 is about 227.5714415568.

The spelling of 11785643 in words is "eleven million, seven hundred eighty-five thousand, six hundred forty-three".