12138773 has 4 divisors (see below), whose sum is σ = 12213408. Its totient is φ = 12064140.

The previous prime is 12138767. The next prime is 12138793. The reversal of 12138773 is 37783121.

12138773 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: 37783121 = 73 ⋅517577.

It is a cyclic number.

It is not a de Polignac number, because 12138773 - 2¹² = 12134677 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 (12138703) 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, 37073 + ... + 37398.

It is an arithmetic number, because the mean of its divisors is an integer number (3053352).

Almost surely, 2^12138773 is an apocalyptic number.

It is an amenable number.

12138773 is a deficient number, since it is larger than the sum of its proper divisors (74635).

12138773 is an equidigital number, since it uses as much as digits as its factorization.

12138773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74634.

The product of its digits is 7056, while the sum is 32.

The square root of 12138773 is about 3484.0741955360. The cubic root of 12138773 is about 229.8219983824.

The spelling of 12138773 in words is "twelve million, one hundred thirty-eight thousand, seven hundred seventy-three".