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12683131 = 109116359
BaseRepresentation
bin110000011000…
…011101111011
3212212100222121
4300120131323
511221330011
61131502111
7212543026
oct60303573
925770877
1012683131
11718302a
1242b7937
132820c16
1419821bd
1511a7e71
hexc1877b

12683131 has 4 divisors (see below), whose sum is σ = 12799600. Its totient is φ = 12566664.

The previous prime is 12683129. The next prime is 12683137. The reversal of 12683131 is 13138621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13138621 = 71185051.

It is a cyclic number.

It is not a de Polignac number, because 12683131 - 21 = 12683129 is a prime.

It is a super-2 number, since 2×126831312 = 321723623926322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12683096 and 12683105.

It is not an unprimeable number, because it can be changed into a prime (12683137) 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, 58071 + ... + 58288.

It is an arithmetic number, because the mean of its divisors is an integer number (3199900).

Almost surely, 212683131 is an apocalyptic number.

12683131 is a deficient number, since it is larger than the sum of its proper divisors (116469).

12683131 is a wasteful number, since it uses less digits than its factorization.

12683131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116468.

The product of its digits is 864, while the sum is 25.

The square root of 12683131 is about 3561.3383720169. The cubic root of 12683131 is about 233.2073099515.

The spelling of 12683131 in words is "twelve million, six hundred eighty-three thousand, one hundred thirty-one".

Divisors: 1 109 116359 12683131