1109987 has 2 divisors, whose sum is σ = 1109988. Its totient is φ = 1109986.

The previous prime is 1109951. The next prime is 1110007. The reversal of 1109987 is 7899011.

It is a strong prime.

It is an emirp because it is prime and its reverse (7899011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109987 - 2¹² = 1105891 is a prime.

It is a super-2 number, since 2×1109987² = 2464142280338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1109287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554993 + 554994.

It is an arithmetic number, because the mean of its divisors is an integer number (554994).

2^1109987 is an apocalyptic number.

1109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109987 is an equidigital number, since it uses as much as digits as its factorization.

1109987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1109987 is about 1053.5592057402. The cubic root of 1109987 is about 103.5394763335.

The spelling of 1109987 in words is "one million, one hundred nine thousand, nine hundred eighty-seven".