11718647 has 2 divisors, whose sum is σ = 11718648. Its totient is φ = 11718646.

The previous prime is 11718631. The next prime is 11718689. The reversal of 11718647 is 74681711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11718647 - 2⁴ = 11718631 is a prime.

It is equal to p₇₇₀₇₇₇ and since 11718647 and 770777 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11718607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859323 + 5859324.

It is an arithmetic number, because the mean of its divisors is an integer number (5859324).

Almost surely, 2^11718647 is an apocalyptic number.

11718647 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718647 is an equidigital number, since it uses as much as digits as its factorization.

11718647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 11718647 is about 3423.2509402613. The cubic root of 11718647 is about 227.1394086321.

The spelling of 11718647 in words is "eleven million, seven hundred eighteen thousand, six hundred forty-seven".