2072909 has 4 divisors (see below), whose sum is σ = 2075904. Its totient is φ = 2069916.

The previous prime is 2072897. The next prime is 2072927. The reversal of 2072909 is 9092702.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9092702 = 2 ⋅4546351.

It is a cyclic number.

It is not a de Polignac number, because 2072909 - 2⁴ = 2072893 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 (2072969) 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, 134 + ... + 2040.

It is an arithmetic number, because the mean of its divisors is an integer number (518976).

2^2072909 is an apocalyptic number.

It is an amenable number.

2072909 is a deficient number, since it is larger than the sum of its proper divisors (2995).

2072909 is a wasteful number, since it uses less digits than its factorization.

2072909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 2072909 is about 1439.7600494527. The cubic root of 2072909 is about 127.5048620471.

The spelling of 2072909 in words is "two million, seventy-two thousand, nine hundred nine".