12566993 has 4 divisors (see below), whose sum is σ = 13113408. Its totient is φ = 12020580.

The previous prime is 12566977. The next prime is 12567007. The reversal of 12566993 is 39966521.

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 12566993 - 2⁴ = 12566977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12566993.

It is not an unprimeable number, because it can be changed into a prime (12566903) 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, 273173 + ... + 273218.

It is an arithmetic number, because the mean of its divisors is an integer number (3278352).

Almost surely, 2^12566993 is an apocalyptic number.

It is an amenable number.

12566993 is a deficient number, since it is larger than the sum of its proper divisors (546415).

12566993 is an equidigital number, since it uses as much as digits as its factorization.

12566993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546414.

The product of its digits is 87480, while the sum is 41.

The square root of 12566993 is about 3544.9954865980. The cubic root of 12566993 is about 232.4933084751.

The spelling of 12566993 in words is "twelve million, five hundred sixty-six thousand, nine hundred ninety-three".