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13472489 = 18737193
BaseRepresentation
bin110011011001…
…001011101001
3221100110210002
4303121023221
511422104424
61200432345
7222341252
oct63311351
927313702
1013472489
117672098
1246186b5
132a392b4
141b09b29
1512b1cae
hexcd92e9

13472489 has 4 divisors (see below), whose sum is σ = 13481556. Its totient is φ = 13463424.

The previous prime is 13472479. The next prime is 13472497. The reversal of 13472489 is 98427431.

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: 98427431 = 228143151.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 12902464 = 755^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 13472489 - 212 = 13468393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13472419) 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, 1724 + ... + 5469.

It is an arithmetic number, because the mean of its divisors is an integer number (3370389).

Almost surely, 213472489 is an apocalyptic number.

It is an amenable number.

13472489 is a deficient number, since it is larger than the sum of its proper divisors (9067).

13472489 is an equidigital number, since it uses as much as digits as its factorization.

13472489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9066.

The product of its digits is 48384, while the sum is 38.

The square root of 13472489 is about 3670.4889320089. The cubic root of 13472489 is about 237.9483033916.

The spelling of 13472489 in words is "thirteen million, four hundred seventy-two thousand, four hundred eighty-nine".

Divisors: 1 1873 7193 13472489