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13053913 = 16218053
BaseRepresentation
bin110001110010…
…111111011001
3220120012121021
4301302333121
511320211123
61143442441
7215646025
oct61627731
926505537
1013053913
117406664
124456421
132920912
141a3b385
15122cc5d
hexc72fd9

13053913 has 4 divisors (see below), whose sum is σ = 13063588. Its totient is φ = 13044240.

The previous prime is 13053899. The next prime is 13053917. The reversal of 13053913 is 31935031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31935031 = 68346757.

It can be written as a sum of positive squares in 2 ways, for example, as 10067929 + 2985984 = 3173^2 + 1728^2 .

It is a cyclic number.

It is not a de Polignac number, because 13053913 - 221 = 10956761 is a prime.

It is a super-2 number, since 2×130539132 = 340809289223138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13053917) 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, 2406 + ... + 5647.

It is an arithmetic number, because the mean of its divisors is an integer number (3265897).

Almost surely, 213053913 is an apocalyptic number.

It is an amenable number.

13053913 is a deficient number, since it is larger than the sum of its proper divisors (9675).

13053913 is an equidigital number, since it uses as much as digits as its factorization.

13053913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9674.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 13053913 is about 3613.0199279827. The cubic root of 13053913 is about 235.4580653572.

Adding to 13053913 its reverse (31935031), we get a palindrome (44988944).

The spelling of 13053913 in words is "thirteen million, fifty-three thousand, nine hundred thirteen".

Divisors: 1 1621 8053 13053913