11956811 has 2 divisors, whose sum is σ = 11956812. Its totient is φ = 11956810.

The previous prime is 11956807. The next prime is 11956837. The reversal of 11956811 is 11865911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11956811 - 2² = 11956807 is a prime.

It is not a weakly prime, because it can be changed into another prime (11956801) 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, 5978405 + 5978406.

It is an arithmetic number, because the mean of its divisors is an integer number (5978406).

Almost surely, 2^11956811 is an apocalyptic number.

11956811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11956811 is an equidigital number, since it uses as much as digits as its factorization.

11956811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 32.

The square root of 11956811 is about 3457.8622008403. The cubic root of 11956811 is about 228.6678568769.

The spelling of 11956811 in words is "eleven million, nine hundred fifty-six thousand, eight hundred eleven".