11978853 has 4 divisors (see below), whose sum is σ = 15971808. Its totient is φ = 7985900.

The previous prime is 11978851. The next prime is 11978867. The reversal of 11978853 is 35887911.

11978853 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35887911 = 3 ⋅11962637.

It is a cyclic number.

It is not a de Polignac number, because 11978853 - 2¹ = 11978851 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978851) 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, 1996473 + ... + 1996478.

It is an arithmetic number, because the mean of its divisors is an integer number (3992952).

Almost surely, 2^11978853 is an apocalyptic number.

It is an amenable number.

11978853 is a deficient number, since it is larger than the sum of its proper divisors (3992955).

11978853 is an equidigital number, since it uses as much as digits as its factorization.

11978853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992954.

The product of its digits is 60480, while the sum is 42.

The square root of 11978853 is about 3461.0479626841. The cubic root of 11978853 is about 228.8082845897.

The spelling of 11978853 in words is "eleven million, nine hundred seventy-eight thousand, eight hundred fifty-three".