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13000005 = 325319319
BaseRepresentation
bin110001100101…
…110101000101
3220110110122200
4301211311011
511312000010
61142345113
7215332614
oct61456505
926413580
1013000005
11737a107
12442b199
132902215
141a2587b
15121bcc0
hexc65d45

13000005 has 24 divisors (see below), whose sum is σ = 23262720. Its totient is φ = 6708960.

The previous prime is 12999997. The next prime is 13000027. The reversal of 13000005 is 50000031.

13000005 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13000005 - 23 = 12999997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3265 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (969280).

Almost surely, 213000005 is an apocalyptic number.

13000005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13000005 is a deficient number, since it is larger than the sum of its proper divisors (10262715).

13000005 is a wasteful number, since it uses less digits than its factorization.

13000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9361 (or 9358 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 13000005 is about 3605.5519688392. The cubic root of 13000005 is about 235.1334989174.

Adding to 13000005 its reverse (50000031), we get a palindrome (63000036).

The spelling of 13000005 in words is "thirteen million, five", and thus it is an aban number and an uban number.

Divisors: 1 3 5 9 15 31 45 93 155 279 465 1395 9319 27957 46595 83871 139785 288889 419355 866667 1444445 2600001 4333335 13000005