11961223 has 2 divisors, whose sum is σ = 11961224. Its totient is φ = 11961222.

The previous prime is 11961221. The next prime is 11961259. The reversal of 11961223 is 32216911.

11961223 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 11961223 - 2¹ = 11961221 is a prime.

Together with 11961221, it forms a pair of twin primes.

It is the 3459-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961221) by changing a digit.

It is a nontrivial repunit in base 3458.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980611 + 5980612.

It is an arithmetic number, because the mean of its divisors is an integer number (5980612).

Almost surely, 2^11961223 is an apocalyptic number.

11961223 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961223 is an equidigital number, since it uses as much as digits as its factorization.

11961223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 11961223 is about 3458.5001084285. The cubic root of 11961223 is about 228.6959791614.

The spelling of 11961223 in words is "eleven million, nine hundred sixty-one thousand, two hundred twenty-three".