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13365409 is a prime number
BaseRepresentation
bin110010111111…
…000010100001
3221011000220011
4302333002201
511410143114
61154244521
7221414131
oct62770241
927130804
1013365409
1175a96a2
124586741
1329cc635
141abcac1
1512901c4
hexcbf0a1

13365409 has 2 divisors, whose sum is σ = 13365410. Its totient is φ = 13365408.

The previous prime is 13365367. The next prime is 13365479. The reversal of 13365409 is 90456331.

13365409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10543009 + 2822400 = 3247^2 + 1680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13365409 is a prime.

It is not a weakly prime, because it can be changed into another prime (13365479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6682704 + 6682705.

It is an arithmetic number, because the mean of its divisors is an integer number (6682705).

Almost surely, 213365409 is an apocalyptic number.

It is an amenable number.

13365409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13365409 is an equidigital number, since it uses as much as digits as its factorization.

13365409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 13365409 is about 3655.8732199025. The cubic root of 13365409 is about 237.3162175635.

The spelling of 13365409 in words is "thirteen million, three hundred sixty-five thousand, four hundred nine".