11687761 has 2 divisors, whose sum is σ = 11687762. Its totient is φ = 11687760.

The previous prime is 11687759. The next prime is 11687771. The reversal of 11687761 is 16778611.

11687761 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 can be written as a sum of positive squares in only one way, i.e., 11289600 + 398161 = 3360^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 11687761 - 2¹ = 11687759 is a prime.

Together with 11687759, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11687761.

It is not a weakly prime, because it can be changed into another prime (11687771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5843880 + 5843881.

It is an arithmetic number, because the mean of its divisors is an integer number (5843881).

Almost surely, 2^11687761 is an apocalyptic number.

It is an amenable number.

11687761 is a deficient number, since it is larger than the sum of its proper divisors (1).

11687761 is an equidigital number, since it uses as much as digits as its factorization.

11687761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 37.

The square root of 11687761 is about 3418.7367550018. The cubic root of 11687761 is about 226.9396813607.

The spelling of 11687761 in words is "eleven million, six hundred eighty-seven thousand, seven hundred sixty-one".