2120009 has 2 divisors, whose sum is σ = 2120010. Its totient is φ = 2120008.

The previous prime is 2119969. The next prime is 2120017. The reversal of 2120009 is 9000212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 727609 = 1180^2 + 853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2119975 and 2120002.

It is not a weakly prime, because it can be changed into another prime (2120099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060004 + 1060005.

It is an arithmetic number, because the mean of its divisors is an integer number (1060005).

2^2120009 is an apocalyptic number.

It is an amenable number.

2120009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120009 is an equidigital number, since it uses as much as digits as its factorization.

2120009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2120009 is about 1456.0250684655. The cubic root of 2120009 is about 128.4633475585.

The spelling of 2120009 in words is "two million, one hundred twenty thousand, nine".