2072905909 has 4 divisors (see below), whose sum is σ = 2182006240. Its totient is φ = 1963805580.

The previous prime is 2072905903. The next prime is 2072905927. The reversal of 2072905909 is 9095092702.

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 not a de Polignac number, because 2072905909 - 2⁹ = 2072905397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2072905903) 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, 54550137 + ... + 54550174.

It is an arithmetic number, because the mean of its divisors is an integer number (545501560).

Almost surely, 2^2072905909 is an apocalyptic number.

It is an amenable number.

2072905909 is a deficient number, since it is larger than the sum of its proper divisors (109100331).

2072905909 is a wasteful number, since it uses less digits than its factorization.

2072905909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109100330.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 2072905909 is about 45529.1764586183. The cubic root of 2072905909 is about 1275.0479867112.

The spelling of 2072905909 in words is "two billion, seventy-two million, nine hundred five thousand, nine hundred nine".