11219987 has 2 divisors, whose sum is σ = 11219988. Its totient is φ = 11219986.

The previous prime is 11219977. The next prime is 11220007. The reversal of 11219987 is 78991211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11219987 - 2⁸ = 11219731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11219987.

It is not a weakly prime, because it can be changed into another prime (11219977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609993 + 5609994.

It is an arithmetic number, because the mean of its divisors is an integer number (5609994).

Almost surely, 2^11219987 is an apocalyptic number.

11219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11219987 is an equidigital number, since it uses as much as digits as its factorization.

11219987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 38.

The square root of 11219987 is about 3349.6249043736. The cubic root of 11219987 is about 223.8708000153.

The spelling of 11219987 in words is "eleven million, two hundred nineteen thousand, nine hundred eighty-seven".