11973887 has 4 divisors (see below), whose sum is σ = 12020736. Its totient is φ = 11927040.

The previous prime is 11973883. The next prime is 11973889. The reversal of 11973887 is 78837911.

11973887 is digitally balanced in base 3, 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: 78837911 = 331 ⋅238181.

It is a cyclic number.

It is not a de Polignac number, because 11973887 - 2² = 11973883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23039 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (3005184).

Almost surely, 2^11973887 is an apocalyptic number.

11973887 is a deficient number, since it is larger than the sum of its proper divisors (46849).

11973887 is an equidigital number, since it uses as much as digits as its factorization.

11973887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46848.

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

The square root of 11973887 is about 3460.3304755471. The cubic root of 11973887 is about 228.7766616679.

The spelling of 11973887 in words is "eleven million, nine hundred seventy-three thousand, eight hundred eighty-seven".