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12993893 = 111181263
BaseRepresentation
bin110001100100…
…010101100101
3220110011021022
4301210111211
511311301033
61142300525
7215306033
oct61442545
926404238
1012993893
117375560
124427745
1328cc4c3
141a23553
15121a098
hexc64565

12993893 has 4 divisors (see below), whose sum is σ = 14175168. Its totient is φ = 11812620.

The previous prime is 12993889. The next prime is 12993907. The reversal of 12993893 is 39839921.

12993893 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 12993893 - 22 = 12993889 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 (12993803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590621 + ... + 590642.

It is an arithmetic number, because the mean of its divisors is an integer number (3543792).

Almost surely, 212993893 is an apocalyptic number.

It is an amenable number.

12993893 is a deficient number, since it is larger than the sum of its proper divisors (1181275).

12993893 is a wasteful number, since it uses less digits than its factorization.

12993893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181274.

The product of its digits is 104976, while the sum is 44.

The square root of 12993893 is about 3604.7042874555. The cubic root of 12993893 is about 235.0966435154.

It can be divided in two parts, 129938 and 93, that added together give a palindrome (130031).

The spelling of 12993893 in words is "twelve million, nine hundred ninety-three thousand, eight hundred ninety-three".

Divisors: 1 11 1181263 12993893