11778289 has 2 divisors, whose sum is σ = 11778290. Its totient is φ = 11778288.

The previous prime is 11778253. The next prime is 11778313. The reversal of 11778289 is 98287711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11675889 + 102400 = 3417^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 11778289 - 2¹¹ = 11776241 is a prime.

It is not a weakly prime, because it can be changed into another prime (11778589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889144 + 5889145.

It is an arithmetic number, because the mean of its divisors is an integer number (5889145).

Almost surely, 2^11778289 is an apocalyptic number.

It is an amenable number.

11778289 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778289 is an equidigital number, since it uses as much as digits as its factorization.

11778289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 43.

The square root of 11778289 is about 3431.9511942917. The cubic root of 11778289 is about 227.5240984012.

The spelling of 11778289 in words is "eleven million, seven hundred seventy-eight thousand, two hundred eighty-nine".