1109019 has 4 divisors (see below), whose sum is σ = 1478696. Its totient is φ = 739344.

The previous prime is 1108999. The next prime is 1109021. The reversal of 1109019 is 9109011.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1109019 - 2⁹ = 1108507 is a prime.

It is a super-2 number, since 2×1109019² = 2459846284722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1108986 and 1109004.

It is not an unprimeable number, because it can be changed into a prime (1109219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184834 + ... + 184839.

It is an arithmetic number, because the mean of its divisors is an integer number (369674).

2^1109019 is an apocalyptic number.

1109019 is a deficient number, since it is larger than the sum of its proper divisors (369677).

1109019 is an equidigital number, since it uses as much as digits as its factorization.

1109019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369676.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 1109019 is about 1053.0997103788. The cubic root of 1109019 is about 103.5093692655.

The spelling of 1109019 in words is "one million, one hundred nine thousand, nineteen".