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13681171 = 79720149
BaseRepresentation
bin110100001100…
…001000010011
3221202002001001
4310030020103
512000244141
61205122431
7224200540
oct64141023
927662031
1013681171
1177a4959
1246b9417
132ab028a
141b61bc7
151303a31
hexd0c213

13681171 has 8 divisors (see below), whose sum is σ = 15797600. Its totient is φ = 11605248.

The previous prime is 13681163. The next prime is 13681211. The reversal of 13681171 is 17118631.

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 13681171 - 23 = 13681163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13681271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9396 + ... + 10753.

It is an arithmetic number, because the mean of its divisors is an integer number (1974700).

Almost surely, 213681171 is an apocalyptic number.

13681171 is a deficient number, since it is larger than the sum of its proper divisors (2116429).

13681171 is an equidigital number, since it uses as much as digits as its factorization.

13681171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253.

The product of its digits is 1008, while the sum is 28.

The square root of 13681171 is about 3698.8066994640. The cubic root of 13681171 is about 239.1705801839.

The spelling of 13681171 in words is "thirteen million, six hundred eighty-one thousand, one hundred seventy-one".

Divisors: 1 7 97 679 20149 141043 1954453 13681171