11561779 has 2 divisors, whose sum is σ = 11561780. Its totient is φ = 11561778.

The previous prime is 11561777. The next prime is 11561827. The reversal of 11561779 is 97716511.

11561779 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 is a cyclic number.

It is not a de Polignac number, because 11561779 - 2¹ = 11561777 is a prime.

Together with 11561777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11561777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780889 + 5780890.

It is an arithmetic number, because the mean of its divisors is an integer number (5780890).

Almost surely, 2^11561779 is an apocalyptic number.

11561779 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561779 is an equidigital number, since it uses as much as digits as its factorization.

11561779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 37.

The square root of 11561779 is about 3400.2616075826. The cubic root of 11561779 is about 226.1213421529.

The spelling of 11561779 in words is "eleven million, five hundred sixty-one thousand, seven hundred seventy-nine".