1109189437 has 4 divisors (see below), whose sum is σ = 1110173020. Its totient is φ = 1108205856.

The previous prime is 1109189399. The next prime is 1109189443. The reversal of 1109189437 is 7349819011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7349819011 = 2659 ⋅2764129.

It can be written as a sum of positive squares in 2 ways, for example, as 173686041 + 935503396 = 13179^2 + 30586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109189437 - 2²³ = 1100800829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1109189393 and 1109189402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109189447) 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, 490098 + ... + 492355.

It is an arithmetic number, because the mean of its divisors is an integer number (277543255).

Almost surely, 2^1109189437 is an apocalyptic number.

It is an amenable number.

1109189437 is a deficient number, since it is larger than the sum of its proper divisors (983583).

1109189437 is an equidigital number, since it uses as much as digits as its factorization.

1109189437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983582.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1109189437 is about 33304.4957475714. The cubic root of 1109189437 is about 1035.1467152592.

The spelling of 1109189437 in words is "one billion, one hundred nine million, one hundred eighty-nine thousand, four hundred thirty-seven".