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13001479 = 61213139
BaseRepresentation
bin110001100110…
…001100000111
3220110112200021
4301212030013
511312021404
61142400011
7215340121
oct61461407
926415607
1013001479
117380227
124430007
132902aaa
141a26211
15121c454
hexc66307

13001479 has 4 divisors (see below), whose sum is σ = 13214680. Its totient is φ = 12788280.

The previous prime is 13001477. The next prime is 13001489. The reversal of 13001479 is 97410031.

13001479 is digitally balanced in base 3, because in such base 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 an emirpimes, since its reverse is a distinct semiprime: 97410031 = 241404191.

It is a cyclic number.

It is not a de Polignac number, because 13001479 - 21 = 13001477 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106509 + ... + 106630.

It is an arithmetic number, because the mean of its divisors is an integer number (3303670).

Almost surely, 213001479 is an apocalyptic number.

13001479 is a deficient number, since it is larger than the sum of its proper divisors (213201).

13001479 is an equidigital number, since it uses as much as digits as its factorization.

13001479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213200.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13001479 is about 3605.7563700283. The cubic root of 13001479 is about 235.1423854186.

The spelling of 13001479 in words is "thirteen million, one thousand, four hundred seventy-nine".

Divisors: 1 61 213139 13001479