11687777 has 4 divisors (see below), whose sum is σ = 11736516. Its totient is φ = 11639040.

The previous prime is 11687771. The next prime is 11687801. The reversal of 11687777 is 77778611.

11687777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77778611 = 4933 ⋅15767.

It can be written as a sum of positive squares in 2 ways, for example, as 5180176 + 6507601 = 2276^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 11687777 - 2⁴ = 11687761 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (11687771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24008 + ... + 24489.

It is an arithmetic number, because the mean of its divisors is an integer number (2934129).

Almost surely, 2^11687777 is an apocalyptic number.

It is an amenable number.

11687777 is a deficient number, since it is larger than the sum of its proper divisors (48739).

11687777 is an equidigital number, since it uses as much as digits as its factorization.

11687777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48738.

The product of its digits is 115248, while the sum is 44.

The square root of 11687777 is about 3418.7390950466. The cubic root of 11687777 is about 226.9397849173.

The spelling of 11687777 in words is "eleven million, six hundred eighty-seven thousand, seven hundred seventy-seven".