12013993 has 4 divisors (see below), whose sum is σ = 12217680. Its totient is φ = 11810308.

The previous prime is 12013973. The next prime is 12013997. The reversal of 12013993 is 39931021.

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: 39931021 = 13 ⋅3071617.

It is a cyclic number.

It is not a de Polignac number, because 12013993 - 2⁹ = 12013481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101755 + ... + 101872.

It is an arithmetic number, because the mean of its divisors is an integer number (3054420).

Almost surely, 2^12013993 is an apocalyptic number.

It is an amenable number.

12013993 is a deficient number, since it is larger than the sum of its proper divisors (203687).

12013993 is an equidigital number, since it uses as much as digits as its factorization.

12013993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203686.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 12013993 is about 3466.1207422708. The cubic root of 12013993 is about 229.0318027569.

The spelling of 12013993 in words is "twelve million, thirteen thousand, nine hundred ninety-three".