2139340009 has 9 divisors (see below), whose sum is σ = 2237511549. Its totient is φ = 2045307660.

The previous prime is 2139339991. The next prime is 2139340013. The reversal of 2139340009 is 9000439312.

The square root of 2139340009 is 46253.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2139340009 - 2⁹ = 2139339497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139340309) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1062814 + ... + 1064824.

Almost surely, 2^2139340009 is an apocalyptic number.

2139340009 is the 46253-rd square number.

2139340009 is the 23127-th centered octagonal number.

It is an amenable number.

2139340009 is a deficient number, since it is larger than the sum of its proper divisors (98171540).

2139340009 is an frugal number, since it uses more digits than its factorization.

2139340009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The cubic root of 2139340009 is about 1288.5262517912.

The spelling of 2139340009 in words is "two billion, one hundred thirty-nine million, three hundred forty thousand, nine".