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12807397 = 531671447
BaseRepresentation
bin110000110110…
…110011100101
3220002200110001
4300312303211
511234314042
61134301301
7213601231
oct60666345
926080401
1012807397
117258429
124357831
132865655
1419b55c1
1511cebb7
hexc36ce5

12807397 has 8 divisors (see below), whose sum is σ = 13136256. Its totient is φ = 12481872.

The previous prime is 12807373. The next prime is 12807413. The reversal of 12807397 is 79370821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12807397 - 211 = 12805349 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 (12807317) 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 7 ways as a sum of consecutive naturals, for example, 8128 + ... + 9574.

It is an arithmetic number, because the mean of its divisors is an integer number (1642032).

Almost surely, 212807397 is an apocalyptic number.

It is an amenable number.

12807397 is a deficient number, since it is larger than the sum of its proper divisors (328859).

12807397 is a wasteful number, since it uses less digits than its factorization.

12807397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12807397 is about 3578.7423768693. The cubic root of 12807397 is about 233.9664707115.

The spelling of 12807397 in words is "twelve million, eight hundred seven thousand, three hundred ninety-seven".

Divisors: 1 53 167 1447 8851 76691 241649 12807397