11506811 has 2 divisors, whose sum is σ = 11506812. Its totient is φ = 11506810.

The previous prime is 11506787. The next prime is 11506813. The reversal of 11506811 is 11860511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11506811 is a prime.

Together with 11506813, 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 (11506813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753405 + 5753406.

It is an arithmetic number, because the mean of its divisors is an integer number (5753406).

Almost surely, 2^11506811 is an apocalyptic number.

11506811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506811 is an equidigital number, since it uses as much as digits as its factorization.

11506811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11506811 is about 3392.1690700789. The cubic root of 11506811 is about 225.7624242670.

The spelling of 11506811 in words is "eleven million, five hundred six thousand, eight hundred eleven".