11780609 has 8 divisors (see below), whose sum is σ = 12505608. Its totient is φ = 11059200.

The previous prime is 11780599. The next prime is 11780617. The reversal of 11780609 is 90608711.

It can be written as a sum of positive squares in 4 ways, for example, as 2900209 + 8880400 = 1703^2 + 2980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11780609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11780309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9209 + ... + 10409.

It is an arithmetic number, because the mean of its divisors is an integer number (1563201).

Almost surely, 2^11780609 is an apocalyptic number.

It is an amenable number.

11780609 is a deficient number, since it is larger than the sum of its proper divisors (724999).

11780609 is a wasteful number, since it uses less digits than its factorization.

11780609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 11780609 is about 3432.2891777937. The cubic root of 11780609 is about 227.5390360902.

The spelling of 11780609 in words is "eleven million, seven hundred eighty thousand, six hundred nine".