2142340009 has 4 divisors (see below), whose sum is σ = 2142437380. Its totient is φ = 2142242640.

The previous prime is 2142340001. The next prime is 2142340019. The reversal of 2142340009 is 9000432412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1753264384 + 389075625 = 41872^2 + 19725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142340009 - 2³ = 2142340001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142340001) 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, 1699 + ... + 65479.

It is an arithmetic number, because the mean of its divisors is an integer number (535609345).

Almost surely, 2^2142340009 is an apocalyptic number.

It is an amenable number.

2142340009 is a deficient number, since it is larger than the sum of its proper divisors (97371).

2142340009 is an equidigital number, since it uses as much as digits as its factorization.

2142340009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97370.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2142340009 is about 46285.4189675323. The cubic root of 2142340009 is about 1289.1282712992.

The spelling of 2142340009 in words is "two billion, one hundred forty-two million, three hundred forty thousand, nine".