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BaseRepresentation
bin110010011101…
…111011110001
3220220010212221
4302131323301
511341323214
61151321041
7220310605
oct62357361
926803787
1013229809
11751682a
124520181
1329829b8
141a85505
151264e24
hexc9def1

13229809 has 2 divisors, whose sum is σ = 13229810. Its totient is φ = 13229808.

The previous prime is 13229803. The next prime is 13229837. The reversal of 13229809 is 90892231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 944784 = 3505^2 + 972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13229809 is a prime.

It is not a weakly prime, because it can be changed into another prime (13229803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6614904 + 6614905.

It is an arithmetic number, because the mean of its divisors is an integer number (6614905).

Almost surely, 213229809 is an apocalyptic number.

It is an amenable number.

13229809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13229809 is an equidigital number, since it uses as much as digits as its factorization.

13229809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 13229809 is about 3637.2804401091. The cubic root of 13229809 is about 236.5109167218.

The spelling of 13229809 in words is "thirteen million, two hundred twenty-nine thousand, eight hundred nine".