2140042009 has 4 divisors (see below), whose sum is σ = 2445762304. Its totient is φ = 1834321716.

The previous prime is 2140041989. The next prime is 2140042019. The reversal of 2140042009 is 9002400412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140042009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140042019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152860137 + ... + 152860150.

It is an arithmetic number, because the mean of its divisors is an integer number (611440576).

Almost surely, 2^2140042009 is an apocalyptic number.

It is an amenable number.

2140042009 is a deficient number, since it is larger than the sum of its proper divisors (305720295).

2140042009 is an equidigital number, since it uses as much as digits as its factorization.

2140042009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305720294.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2140042009 is about 46260.5880745154. The cubic root of 2140042009 is about 1288.6671747712.

The spelling of 2140042009 in words is "two billion, one hundred forty million, forty-two thousand, nine".