11810987 has 2 divisors, whose sum is σ = 11810988. Its totient is φ = 11810986.

The previous prime is 11810963. The next prime is 11810999. The reversal of 11810987 is 78901811.

11810987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11810987 - 2⁸ = 11810731 is a prime.

It is a Chen prime.

It is equal to p₇₇₆₄₅₆ and since 11810987 and 776456 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11810947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905493 + 5905494.

It is an arithmetic number, because the mean of its divisors is an integer number (5905494).

Almost surely, 2^11810987 is an apocalyptic number.

11810987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11810987 is an equidigital number, since it uses as much as digits as its factorization.

11810987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11810987 is about 3436.7116550563. The cubic root of 11810987 is about 227.7344489641.

The spelling of 11810987 in words is "eleven million, eight hundred ten thousand, nine hundred eighty-seven".