12393911 has 4 divisors (see below), whose sum is σ = 12408024. Its totient is φ = 12379800.

The previous prime is 12393889. The next prime is 12393923. The reversal of 12393911 is 11939321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11939321 = 17 ⋅702313.

It is a cyclic number.

It is not a de Polignac number, because 12393911 - 2¹⁴ = 12377527 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 (12393971) 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, 5645 + ... + 7526.

It is an arithmetic number, because the mean of its divisors is an integer number (3102006).

Almost surely, 2^12393911 is an apocalyptic number.

12393911 is a deficient number, since it is larger than the sum of its proper divisors (14113).

12393911 is an equidigital number, since it uses as much as digits as its factorization.

12393911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14112.

The product of its digits is 1458, while the sum is 29.

The square root of 12393911 is about 3520.4986862659. The cubic root of 12393911 is about 231.4210134089.

The spelling of 12393911 in words is "twelve million, three hundred ninety-three thousand, nine hundred eleven".