11881687 has 2 divisors, whose sum is σ = 11881688. Its totient is φ = 11881686.

The previous prime is 11881673. The next prime is 11881697. The reversal of 11881687 is 78618811.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11881687 - 2¹⁵ = 11848919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11881697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5940843 + 5940844.

It is an arithmetic number, because the mean of its divisors is an integer number (5940844).

Almost surely, 2^11881687 is an apocalyptic number.

11881687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11881687 is an equidigital number, since it uses as much as digits as its factorization.

11881687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 40.

The square root of 11881687 is about 3446.9823034069. The cubic root of 11881687 is about 228.1879477756.

The spelling of 11881687 in words is "eleven million, eight hundred eighty-one thousand, six hundred eighty-seven".