11780639 has 4 divisors (see below), whose sum is σ = 12686856. Its totient is φ = 10874424.

The previous prime is 11780617. The next prime is 11780687. The reversal of 11780639 is 93608711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11780639 - 2⁸ = 11780383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11780599 and 11780608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11780039) 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, 453089 + ... + 453114.

It is an arithmetic number, because the mean of its divisors is an integer number (3171714).

Almost surely, 2^11780639 is an apocalyptic number.

11780639 is a deficient number, since it is larger than the sum of its proper divisors (906217).

11780639 is an equidigital number, since it uses as much as digits as its factorization.

11780639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906216.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 11780639 is about 3432.2935480521. The cubic root of 11780639 is about 227.5392292372.

The spelling of 11780639 in words is "eleven million, seven hundred eighty thousand, six hundred thirty-nine".