11963609 has 4 divisors (see below), whose sum is σ = 13672704. Its totient is φ = 10254516.

The previous prime is 11963599. The next prime is 11963639. The reversal of 11963609 is 90636911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11963609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11963639) 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 in 3 ways as a sum of consecutive naturals, for example, 854537 + ... + 854550.

It is an arithmetic number, because the mean of its divisors is an integer number (3418176).

Almost surely, 2^11963609 is an apocalyptic number.

It is an amenable number.

11963609 is a deficient number, since it is larger than the sum of its proper divisors (1709095).

11963609 is an equidigital number, since it uses as much as digits as its factorization.

11963609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709094.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 11963609 is about 3458.8450384485. The cubic root of 11963609 is about 228.7111847505.

The spelling of 11963609 in words is "eleven million, nine hundred sixty-three thousand, six hundred nine".