11213987 has 2 divisors, whose sum is σ = 11213988. Its totient is φ = 11213986.

The previous prime is 11213977. The next prime is 11214023. The reversal of 11213987 is 78931211.

11213987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (78931211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11213957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606993 + 5606994.

It is an arithmetic number, because the mean of its divisors is an integer number (5606994).

Almost surely, 2^11213987 is an apocalyptic number.

11213987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213987 is an equidigital number, since it uses as much as digits as its factorization.

11213987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 11213987 is about 3348.7291619359. The cubic root of 11213987 is about 223.8308871852.

The spelling of 11213987 in words is "eleven million, two hundred thirteen thousand, nine hundred eighty-seven".