11281987 has 2 divisors, whose sum is σ = 11281988. Its totient is φ = 11281986.

The previous prime is 11281979. The next prime is 11281997. The reversal of 11281987 is 78918211.

11281987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11281987 - 2³ = 11281979 is a prime.

It is not a weakly prime, because it can be changed into another prime (11281967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5640993 + 5640994.

It is an arithmetic number, because the mean of its divisors is an integer number (5640994).

Almost surely, 2^11281987 is an apocalyptic number.

11281987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11281987 is an equidigital number, since it uses as much as digits as its factorization.

11281987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 37.

The square root of 11281987 is about 3358.8669220438. The cubic root of 11281987 is about 224.2824018451.

The spelling of 11281987 in words is "eleven million, two hundred eighty-one thousand, nine hundred eighty-seven".