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13864697 = 721129887
BaseRepresentation
bin110100111000…
…111011111001
3222002101210022
4310320323321
512022132242
61213100225
7225563600
oct64707371
928071708
1013864697
11790a830
124787675
132b45982
141baca37
15133d0d2
hexd38ef9

13864697 has 24 divisors (see below), whose sum is σ = 18221760. Its totient is φ = 10419360.

The previous prime is 13864679. The next prime is 13864703. The reversal of 13864697 is 79646831.

It is not a de Polignac number, because 13864697 - 214 = 13848313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13864397) 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, 15188 + ... + 16074.

It is an arithmetic number, because the mean of its divisors is an integer number (759240).

Almost surely, 213864697 is an apocalyptic number.

It is an amenable number.

13864697 is a deficient number, since it is larger than the sum of its proper divisors (4357063).

13864697 is a wasteful number, since it uses less digits than its factorization.

13864697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 934 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 13864697 is about 3723.5328654384. The cubic root of 13864697 is about 240.2352843096.

The spelling of 13864697 in words is "thirteen million, eight hundred sixty-four thousand, six hundred ninety-seven".

Divisors: 1 7 11 29 49 77 203 319 539 887 1421 2233 6209 9757 15631 25723 43463 68299 180061 282953 478093 1260427 1980671 13864697