2107909 has 2 divisors, whose sum is σ = 2107910. Its totient is φ = 2107908.

The previous prime is 2107883. The next prime is 2107913. The reversal of 2107909 is 9097012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 77284 = 1425^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2107909 - 2⁵ = 2107877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2107939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053954 + 1053955.

It is an arithmetic number, because the mean of its divisors is an integer number (1053955).

2^2107909 is an apocalyptic number.

It is an amenable number.

2107909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2107909 is an equidigital number, since it uses as much as digits as its factorization.

2107909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 2107909 is about 1451.8639743447. The cubic root of 2107909 is about 128.2184785998.

The spelling of 2107909 in words is "two million, one hundred seven thousand, nine hundred nine".