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13705349 = 721716453
BaseRepresentation
bin110100010010…
…000010000101
3221210022012112
4310102002011
512002032344
61205430405
7224331200
oct64220205
927708175
1013705349
117811039
12470b405
132abb298
141b6a937
15130ac9e
hexd12085

13705349 has 12 divisors (see below), whose sum is σ = 16881804. Its totient is φ = 11055744.

The previous prime is 13705339. The next prime is 13705361. The reversal of 13705349 is 94350731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11764900 + 1940449 = 3430^2 + 1393^2 .

It is a de Polignac number, because none of the positive numbers 2k-13705349 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 (13705339) 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, 7394 + ... + 9059.

It is an arithmetic number, because the mean of its divisors is an integer number (1406817).

Almost surely, 213705349 is an apocalyptic number.

It is an amenable number.

13705349 is a deficient number, since it is larger than the sum of its proper divisors (3176455).

13705349 is a wasteful number, since it uses less digits than its factorization.

13705349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16484 (or 16477 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 13705349 is about 3702.0736081283. The cubic root of 13705349 is about 239.3113883833.

The spelling of 13705349 in words is "thirteen million, seven hundred five thousand, three hundred forty-nine".

Divisors: 1 7 17 49 119 833 16453 115171 279701 806197 1957907 13705349