11920289 has 2 divisors, whose sum is σ = 11920290. Its totient is φ = 11920288.

The previous prime is 11920229. The next prime is 11920291. The reversal of 11920289 is 98202911.

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., 11662225 + 258064 = 3415^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 11920289 - 2⁸ = 11920033 is a prime.

Together with 11920291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11920229) 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 as a sum of consecutive naturals, namely, 5960144 + 5960145.

It is an arithmetic number, because the mean of its divisors is an integer number (5960145).

Almost surely, 2^11920289 is an apocalyptic number.

It is an amenable number.

11920289 is a deficient number, since it is larger than the sum of its proper divisors (1).

11920289 is an equidigital number, since it uses as much as digits as its factorization.

11920289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 11920289 is about 3452.5771533740. The cubic root of 11920289 is about 228.4347979386.

The spelling of 11920289 in words is "eleven million, nine hundred twenty thousand, two hundred eighty-nine".