2009142009 has 32 divisors (see below), whose sum is σ = 3418880000. Its totient is φ = 1142290512.

The previous prime is 2009142007. The next prime is 2009142013. The reversal of 2009142009 is 9002419002.

It is not a de Polignac number, because 2009142009 - 2¹ = 2009142007 is a prime.

It is a super-2 number, since 2×2009142009² = 8073303224657112162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009142007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10902 + ... + 64320.

It is an arithmetic number, because the mean of its divisors is an integer number (106840000).

Almost surely, 2^2009142009 is an apocalyptic number.

It is an amenable number.

2009142009 is a deficient number, since it is larger than the sum of its proper divisors (1409737991).

2009142009 is a wasteful number, since it uses less digits than its factorization.

2009142009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53634 (or 53628 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2009142009 is about 44823.4537825902. The cubic root of 2009142009 is about 1261.8378339082.

The spelling of 2009142009 in words is "two billion, nine million, one hundred forty-two thousand, nine".