11655409 has 2 divisors, whose sum is σ = 11655410. Its totient is φ = 11655408.

The previous prime is 11655373. The next prime is 11655461. The reversal of 11655409 is 90455611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 3504384 = 2855^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 11655409 - 2¹¹ = 11653361 is a prime.

It is not a weakly prime, because it can be changed into another prime (11659409) 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 as a sum of consecutive naturals, namely, 5827704 + 5827705.

It is an arithmetic number, because the mean of its divisors is an integer number (5827705).

Almost surely, 2^11655409 is an apocalyptic number.

It is an amenable number.

11655409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11655409 is an equidigital number, since it uses as much as digits as its factorization.

11655409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 11655409 is about 3414.0019039245. The cubic root of 11655409 is about 226.7300963872.

The spelling of 11655409 in words is "eleven million, six hundred fifty-five thousand, four hundred nine".