12427993 has 4 divisors (see below), whose sum is σ = 12828928. Its totient is φ = 12027060.

The previous prime is 12427991. The next prime is 12427997. The reversal of 12427993 is 39972421.

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.

It is a cyclic number.

It is not a de Polignac number, because 12427993 - 2¹ = 12427991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12427991) 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, 200421 + ... + 200482.

It is an arithmetic number, because the mean of its divisors is an integer number (3207232).

Almost surely, 2^12427993 is an apocalyptic number.

It is an amenable number.

12427993 is a deficient number, since it is larger than the sum of its proper divisors (400935).

12427993 is an equidigital number, since it uses as much as digits as its factorization.

12427993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400934.

The product of its digits is 27216, while the sum is 37.

The square root of 12427993 is about 3525.3358705235. The cubic root of 12427993 is about 231.6329473780.

The spelling of 12427993 in words is "twelve million, four hundred twenty-seven thousand, nine hundred ninety-three".