2011409 has 2 divisors, whose sum is σ = 2011410. Its totient is φ = 2011408.

The previous prime is 2011393. The next prime is 2011417. The reversal of 2011409 is 9041102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 313600 = 1303^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011409 - 2⁴ = 2011393 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (2011439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005704 + 1005705.

It is an arithmetic number, because the mean of its divisors is an integer number (1005705).

2^2011409 is an apocalyptic number.

It is an amenable number.

2011409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011409 is an equidigital number, since it uses as much as digits as its factorization.

2011409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2011409 is about 1418.2415168088. The cubic root of 2011409 is about 126.2312248654.

The spelling of 2011409 in words is "two million, eleven thousand, four hundred nine".