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13238053 = 17778709
BaseRepresentation
bin110010011111…
…111100100101
3220220120012021
4302133330211
511342104203
61151423141
7220343623
oct62377445
926816167
1013238053
117521a44
124524ab1
13298668a
141a88513
1512675bd
hexc9ff25

13238053 has 4 divisors (see below), whose sum is σ = 14016780. Its totient is φ = 12459328.

The previous prime is 13238051. The next prime is 13238101. The reversal of 13238053 is 35083231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35083231 = 313112087.

It can be written as a sum of positive squares in 2 ways, for example, as 7171684 + 6066369 = 2678^2 + 2463^2 .

It is a cyclic number.

It is not a de Polignac number, because 13238053 - 21 = 13238051 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 (13238051) 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, 389338 + ... + 389371.

It is an arithmetic number, because the mean of its divisors is an integer number (3504195).

Almost surely, 213238053 is an apocalyptic number.

It is an amenable number.

13238053 is a deficient number, since it is larger than the sum of its proper divisors (778727).

13238053 is an equidigital number, since it uses as much as digits as its factorization.

13238053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778726.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 13238053 is about 3638.4135278992. The cubic root of 13238053 is about 236.5600328539.

The spelling of 13238053 in words is "thirteen million, two hundred thirty-eight thousand, fifty-three".

Divisors: 1 17 778709 13238053