2049409 has 2 divisors, whose sum is σ = 2049410. Its totient is φ = 2049408.

The previous prime is 2049407. The next prime is 2049419. The reversal of 2049409 is 9049402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 199809 = 1360^2 + 447^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049409 - 2¹ = 2049407 is a prime.

Together with 2049407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2049407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024704 + 1024705.

It is an arithmetic number, because the mean of its divisors is an integer number (1024705).

2^2049409 is an apocalyptic number.

It is an amenable number.

2049409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049409 is an equidigital number, since it uses as much as digits as its factorization.

2049409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2049409 is about 1431.5757052982. The cubic root of 2049409 is about 127.0212005031.

The spelling of 2049409 in words is "two million, forty-nine thousand, four hundred nine".