1109398 has 4 divisors (see below), whose sum is σ = 1664100. Its totient is φ = 554698.

The previous prime is 1109393. The next prime is 1109399. The reversal of 1109398 is 8939011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8939011 = 2957 ⋅3023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109393) 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, 277348 + ... + 277351.

It is an arithmetic number, because the mean of its divisors is an integer number (416025).

2^1109398 is an apocalyptic number.

1109398 is a deficient number, since it is larger than the sum of its proper divisors (554702).

1109398 is an equidigital number, since it uses as much as digits as its factorization.

1109398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554701.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1109398 is about 1053.2796399817. The cubic root of 1109398 is about 103.5211591395.

The spelling of 1109398 in words is "one million, one hundred nine thousand, three hundred ninety-eight".