11538409 has 2 divisors, whose sum is σ = 11538410. Its totient is φ = 11538408.

The previous prime is 11538403. The next prime is 11538419. The reversal of 11538409 is 90483511.

11538409 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., 7425625 + 4112784 = 2725^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 11538409 - 2¹¹ = 11536361 is a prime.

It is not a weakly prime, because it can be changed into another prime (11538403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5769204 + 5769205.

It is an arithmetic number, because the mean of its divisors is an integer number (5769205).

Almost surely, 2^11538409 is an apocalyptic number.

It is an amenable number.

11538409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11538409 is an equidigital number, since it uses as much as digits as its factorization.

11538409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 11538409 is about 3396.8233689728. The cubic root of 11538409 is about 225.9688852144.

The spelling of 11538409 in words is "eleven million, five hundred thirty-eight thousand, four hundred nine".