11512609 has 2 divisors, whose sum is σ = 11512610. Its totient is φ = 11512608.

The previous prime is 11512601. The next prime is 11512649. The reversal of 11512609 is 90621511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11424400 + 88209 = 3380^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 11512609 - 2³ = 11512601 is a prime.

It is not a weakly prime, because it can be changed into another prime (11512601) 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, 5756304 + 5756305.

It is an arithmetic number, because the mean of its divisors is an integer number (5756305).

Almost surely, 2^11512609 is an apocalyptic number.

It is an amenable number.

11512609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512609 is an equidigital number, since it uses as much as digits as its factorization.

11512609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 11512609 is about 3393.0235778727. The cubic root of 11512609 is about 225.8003366172.

It can be divided in two parts, 11512 and 609, that added together give a palindrome (12121).

The spelling of 11512609 in words is "eleven million, five hundred twelve thousand, six hundred nine".