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12708913 = 71815559
BaseRepresentation
bin110000011110…
…110000110001
3212220200100111
4300132300301
511223141123
61132221321
7213011140
oct60366061
925820314
1012708913
1171a0438
12430a841
13282c889
14198b757
1511b090d
hexc1ec31

12708913 has 4 divisors (see below), whose sum is σ = 14524480. Its totient is φ = 10893348.

The previous prime is 12708889. The next prime is 12708919. The reversal of 12708913 is 31980721.

12708913 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 12708913 - 25 = 12708881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12708919) 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, 907773 + ... + 907786.

It is an arithmetic number, because the mean of its divisors is an integer number (3631120).

Almost surely, 212708913 is an apocalyptic number.

It is an amenable number.

12708913 is a deficient number, since it is larger than the sum of its proper divisors (1815567).

12708913 is an equidigital number, since it uses as much as digits as its factorization.

12708913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815566.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12708913 is about 3564.9562409657. The cubic root of 12708913 is about 233.3652226257.

The spelling of 12708913 in words is "twelve million, seven hundred eight thousand, nine hundred thirteen".

Divisors: 1 7 1815559 12708913