11778839 has 4 divisors (see below), whose sum is σ = 12097224. Its totient is φ = 11460456.

The previous prime is 11778797. The next prime is 11778847. The reversal of 11778839 is 93887711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93887711 = 6701 ⋅14011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11778839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11778839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778859) 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, 159137 + ... + 159210.

It is an arithmetic number, because the mean of its divisors is an integer number (3024306).

Almost surely, 2^11778839 is an apocalyptic number.

11778839 is a deficient number, since it is larger than the sum of its proper divisors (318385).

11778839 is an equidigital number, since it uses as much as digits as its factorization.

11778839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318384.

The product of its digits is 84672, while the sum is 44.

The square root of 11778839 is about 3432.0313227009. The cubic root of 11778839 is about 227.5276398411.

The spelling of 11778839 in words is "eleven million, seven hundred seventy-eight thousand, eight hundred thirty-nine".