11687906 has 4 divisors (see below), whose sum is σ = 17531862. Its totient is φ = 5843952.

The previous prime is 11687903. The next prime is 11687909. The reversal of 11687906 is 60978611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60978611 = 4903 ⋅12437.

It is an interprime number because it is at equal distance from previous prime (11687903) and next prime (11687909).

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 525625 = 3341^2 + 725^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11687906.

It is not an unprimeable number, because it can be changed into a prime (11687903) 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, 2921975 + ... + 2921978.

Almost surely, 2^11687906 is an apocalyptic number.

11687906 is a deficient number, since it is larger than the sum of its proper divisors (5843956).

11687906 is an equidigital number, since it uses as much as digits as its factorization.

11687906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5843955.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 11687906 is about 3418.7579615995. The cubic root of 11687906 is about 226.9406198387.

The spelling of 11687906 in words is "eleven million, six hundred eighty-seven thousand, nine hundred six".