2904409 has 2 divisors, whose sum is σ = 2904410. Its totient is φ = 2904408.

The previous prime is 2904403. The next prime is 2904413. The reversal of 2904409 is 9044092.

2904409 = T₁₃₉₀ + T₁₃₉₁ + T₁₃₉₂.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 1108809 = 1340^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 2904409 - 2⁷ = 2904281 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2904403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452204 + 1452205.

It is an arithmetic number, because the mean of its divisors is an integer number (1452205).

2^2904409 is an apocalyptic number.

2904409 is the 1392-nd centered triangular number.

It is an amenable number.

2904409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2904409 is an equidigital number, since it uses as much as digits as its factorization.

2904409 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 2904409 is about 1704.2326719084. The cubic root of 2904409 is about 142.6765473645.

The spelling of 2904409 in words is "two million, nine hundred four thousand, four hundred nine".