1123370209 has 48 divisors (see below), whose sum is σ = 1333832832. Its totient is φ = 942948864.

The previous prime is 1123370201. The next prime is 1123370233. The reversal of 1123370209 is 9020733211.

It is not a de Polignac number, because 1123370209 - 2³ = 1123370201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123370201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10498734 + ... + 10498840.

It is an arithmetic number, because the mean of its divisors is an integer number (27788184).

Almost surely, 2^1123370209 is an apocalyptic number.

It is an amenable number.

1123370209 is a deficient number, since it is larger than the sum of its proper divisors (210462623).

1123370209 is a wasteful number, since it uses less digits than its factorization.

1123370209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1123370209 is about 33516.7153671120. The cubic root of 1123370209 is about 1039.5394314820.

The spelling of 1123370209 in words is "one billion, one hundred twenty-three million, three hundred seventy thousand, two hundred nine".