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13204013 = 110311971
BaseRepresentation
bin110010010111…
…101000101101
3220211211111112
4302113220231
511340012023
61151001405
7220142444
oct62275055
926754445
1013204013
1174a9409
124509265
132974034
141a79d5b
15125c478
hexc97a2d

13204013 has 4 divisors (see below), whose sum is σ = 13217088. Its totient is φ = 13190940.

The previous prime is 13204007. The next prime is 13204043. The reversal of 13204013 is 31040231.

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 a cyclic number.

It is not a de Polignac number, because 13204013 - 212 = 13199917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4883 + ... + 7088.

It is an arithmetic number, because the mean of its divisors is an integer number (3304272).

Almost surely, 213204013 is an apocalyptic number.

It is an amenable number.

13204013 is a deficient number, since it is larger than the sum of its proper divisors (13075).

13204013 is a wasteful number, since it uses less digits than its factorization.

13204013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13074.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13204013 is about 3633.7326538974. The cubic root of 13204013 is about 236.3570972864.

Adding to 13204013 its reverse (31040231), we get a palindrome (44244244).

The spelling of 13204013 in words is "thirteen million, two hundred four thousand, thirteen".

Divisors: 1 1103 11971 13204013