2010409 has 6 divisors (see below), whose sum is σ = 2122170. Its totient is φ = 1904256.

The previous prime is 2010401. The next prime is 2010413. The reversal of 2010409 is 9040102.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 577600 = 1197^2 + 760^2 .

It is not a de Polignac number, because 2010409 - 2³ = 2010401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010392 and 2010401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2424 + ... + 3145.

It is an arithmetic number, because the mean of its divisors is an integer number (353695).

2^2010409 is an apocalyptic number.

It is an amenable number.

2010409 is a deficient number, since it is larger than the sum of its proper divisors (111761).

2010409 is an equidigital number, since it uses as much as digits as its factorization.

2010409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2010409 is about 1417.8889237172. Note that the first 3 decimals coincide. The cubic root of 2010409 is about 126.2103021938.

The spelling of 2010409 in words is "two million, ten thousand, four hundred nine".