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11869409 is a prime number
BaseRepresentation
bin101101010001…
…110011100001
3211100000202202
4231101303201
511014310114
61102222545
7202613456
oct55216341
924300682
1011869409
116777732
123b84a55
1325c7726
14180d82d
151096cde
hexb51ce1

11869409 has 2 divisors, whose sum is σ = 11869410. Its totient is φ = 11869408.

The previous prime is 11869399. The next prime is 11869421. The reversal of 11869409 is 90496811.

It is a happy number.

11869409 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., 7980625 + 3888784 = 2825^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 11869409 - 24 = 11869393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11869609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5934704 + 5934705.

It is an arithmetic number, because the mean of its divisors is an integer number (5934705).

Almost surely, 211869409 is an apocalyptic number.

It is an amenable number.

11869409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11869409 is an equidigital number, since it uses as much as digits as its factorization.

11869409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 11869409 is about 3445.2008649714. The cubic root of 11869409 is about 228.1093209716.

The spelling of 11869409 in words is "eleven million, eight hundred sixty-nine thousand, four hundred nine".