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13789917 = 3210914057
BaseRepresentation
bin110100100110…
…101011011101
3221221121012200
4310212223131
512012234132
61211322113
7225132561
oct64465335
927847180
1013789917
117869629
124750339
132b1a91b
141b8d6a1
151325d7c
hexd26add

13789917 has 12 divisors (see below), whose sum is σ = 20102940. Its totient is φ = 9108288.

The previous prime is 13789889. The next prime is 13789933. The reversal of 13789917 is 71998731.

It can be written as a sum of positive squares in 2 ways, for example, as 4186116 + 9603801 = 2046^2 + 3099^2 .

It is not a de Polignac number, because 13789917 - 214 = 13773533 is a prime.

It is a house number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13789957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6048 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (1675245).

Almost surely, 213789917 is an apocalyptic number.

It is an amenable number.

13789917 is a deficient number, since it is larger than the sum of its proper divisors (6313023).

13789917 is a wasteful number, since it uses less digits than its factorization.

13789917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14172 (or 14169 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 13789917 is about 3713.4777500343. The cubic root of 13789917 is about 239.8025980966.

It can be divided in two parts, 13789 and 917, that added together give a triangular number (14706 = T171).

The spelling of 13789917 in words is "thirteen million, seven hundred eighty-nine thousand, nine hundred seventeen".

Divisors: 1 3 9 109 327 981 14057 42171 126513 1532213 4596639 13789917