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12907869 = 313432179
BaseRepresentation
bin110001001111…
…010101011101
3220021210021020
4301033111131
511301022434
61140354353
7214500162
oct61172535
926253236
1012907869
117316967
1243a59b9
13289c2c0
141a00069
1511ee849
hexc4f55d

12907869 has 24 divisors (see below), whose sum is σ = 19081440. Its totient is φ = 7715232.

The previous prime is 12907847. The next prime is 12907883. The reversal of 12907869 is 96870921.

It is not a de Polignac number, because 12907869 - 25 = 12907837 is a prime.

It is a super-2 number, since 2×129078692 = 333226164242322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12907869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12907819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72022 + ... + 72200.

It is an arithmetic number, because the mean of its divisors is an integer number (795060).

Almost surely, 212907869 is an apocalyptic number.

It is an amenable number.

12907869 is a deficient number, since it is larger than the sum of its proper divisors (6173571).

12907869 is a wasteful number, since it uses less digits than its factorization.

12907869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12907869 is about 3592.7522875923. The cubic root of 12907869 is about 234.5766877598.

The spelling of 12907869 in words is "twelve million, nine hundred seven thousand, eight hundred sixty-nine".

Divisors: 1 3 13 39 43 129 179 537 559 1677 1849 2327 5547 6981 7697 23091 24037 72111 100061 300183 330971 992913 4302623 12907869