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13638943 is a prime number
BaseRepresentation
bin110100000001…
…110100011111
3221122221010001
4310001310133
511442421233
61204155131
7223633453
oct64016437
927587101
1013638943
11777615a
124698aa7
132a96ca6
141b50663
1512e627d
hexd01d1f

13638943 has 2 divisors, whose sum is σ = 13638944. Its totient is φ = 13638942.

The previous prime is 13638907. The next prime is 13638991. The reversal of 13638943 is 34983631.

13638943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13638943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13638043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819471 + 6819472.

It is an arithmetic number, because the mean of its divisors is an integer number (6819472).

Almost surely, 213638943 is an apocalyptic number.

13638943 is a deficient number, since it is larger than the sum of its proper divisors (1).

13638943 is an equidigital number, since it uses as much as digits as its factorization.

13638943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 13638943 is about 3693.0939603536. The cubic root of 13638943 is about 238.9242536991.

The spelling of 13638943 in words is "thirteen million, six hundred thirty-eight thousand, nine hundred forty-three".