2009123126 has 4 divisors (see below), whose sum is σ = 3013684692. Its totient is φ = 1004561562.

The previous prime is 2009123111. The next prime is 2009123131. The reversal of 2009123126 is 6213219002.

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

It is a junction number, because it is equal to n+sod(n) for n = 2009123095 and 2009123104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502280780 + ... + 502280783.

It is an arithmetic number, because the mean of its divisors is an integer number (753421173).

Almost surely, 2^2009123126 is an apocalyptic number.

2009123126 is a deficient number, since it is larger than the sum of its proper divisors (1004561566).

2009123126 is a wasteful number, since it uses less digits than its factorization.

2009123126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004561565.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2009123126 is about 44823.2431446008. The cubic root of 2009123126 is about 1261.8338807517.

The spelling of 2009123126 in words is "two billion, nine million, one hundred twenty-three thousand, one hundred twenty-six".