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13712169 = 34570723
BaseRepresentation
bin110100010011…
…101100101001
3221210122120010
4310103230221
512002242134
61205522133
7224360112
oct64235451
927718503
1013712169
117816179
124713349
132ac1413
141b6d209
15130cce9
hexd13b29

13712169 has 4 divisors (see below), whose sum is σ = 18282896. Its totient is φ = 9141444.

The previous prime is 13712161. The next prime is 13712189. The reversal of 13712169 is 96121731.

13712169 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13712169 - 23 = 13712161 is a prime.

It is a super-2 number, since 2×137121692 = 376047157369122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13712161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285359 + ... + 2285364.

It is an arithmetic number, because the mean of its divisors is an integer number (4570724).

Almost surely, 213712169 is an apocalyptic number.

It is an amenable number.

13712169 is a deficient number, since it is larger than the sum of its proper divisors (4570727).

13712169 is an equidigital number, since it uses as much as digits as its factorization.

13712169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570726.

The product of its digits is 2268, while the sum is 30.

The square root of 13712169 is about 3702.9945989699. The cubic root of 13712169 is about 239.3510768540.

The spelling of 13712169 in words is "thirteen million, seven hundred twelve thousand, one hundred sixty-nine".

Divisors: 1 3 4570723 13712169